CS/IT 114 Introduction to Java, Part 1 FALL 2016 CLASS 8: SEP. 29TH INSTRUCTOR: JIAYIN WANG

Size: px
Start display at page:

Download "CS/IT 114 Introduction to Java, Part 1 FALL 2016 CLASS 8: SEP. 29TH INSTRUCTOR: JIAYIN WANG"

Transcription

1 CS/IT 114 Introduction to Java, Part 1 FALL 2016 CLASS 8: SEP. 29TH INSTRUCTOR: JIAYIN WANG 1

2 Notice Prepare the Weekly Quiz The weekly quiz is for the knowledge we learned in the previous week (both the class on Tuesday and Thursday) Review the class quiz Review the class slides, especially the review part I will mark the important knowledge in red in the class slides Requests for the weekly quiz Open book, but no electronic devices allowed The first two weekly quiz are considered as practice, no impacting for your finial grading Assignments The Class 8 Exercise for today is posted here. The homework 2 and posted it here They are due this coming Sunday, at 11:59 PM. 2

3 Review The for loop In programming, we often do the same thing many times To make this possible programming languages provide loops The simplest kind of loop is the for loop Suppose you wanted to print the first 5 perfect squares We need to repeat something 5 times, changing a value each time 3

4 The for loop A for statement has two major parts Three statements inside parentheses that control the loop A series of statements executed with each pass through the loop The series of statements are called the loop body... and are enclosed in curly braces, { } Here is the format for the for loop for (INITIALIZATION; CONTINUATION_TEST; UPDATE) { } STATEMENT;... 4

5 The for loop The code inside the parentheses controls the loop It consists of three separate statements on the same line separated by semi- colon ; 5

6 The for loop Declare the variable Assign it its first value It s done before entering the loop An expression that returns a boolean value The loop will continue if the continuation test is true Otherwise, the loop will stop The update changes the value after the loop statements have been executed before the continuation test i is called control variable or loop variable It s used to count the number of pass trough the loop It must be an integer The traditional names for such variable is i, j, or k 6

7 The for loop in Action Here is the flow chart for a for loop Give the control variable its starting value This happens only once Evaluate the test condition If the test is true: Execute all statements. Then, update the control variable If the test is false, jump out of the loop 7

8 Common Programming Error: Forgetting Curly Braces One of the most common Java programming errors is forgetting to use curly braces The curly braces mark the beginning and end of the loop body The loop body is the series of statements... that are executed with each pass through the loop It prints Hi! 10 times and Ho! once 8

9 for Loop Patterns The three control statements in a for loop can be used many ways. But some patterns are more common than others The most common for loop pattern is the following for (int LOOP_VARIABLE = 1; LOOP_VARIABLE <= n; LOOP_VARIABLE++) { } STATEMENT;... This loop starts with the control variable set to 1 and executes the statements contained in the loop body n times So the following code will produce this output: 9

10 for Loop Patterns Often, it is more convenient to start counting from 0 instead of one Here is the pattern for (int LOOP_VARIABLE = 0; LOOP_VARIABLE < n; LOOP_VARIABLE++) { } STATEMENT;... There are two differences between this pattern and the previous one The control variable is initialized to 0 instead of 1 And the continuation test uses < instead of <= 10

11 for Loop Patterns Usually the update statement increases the value of the loop variable But you can also run a for loop backwards Here the the pattern for a decrementing loop for (int LOOP_VARIABLE = n; LOOP_VARIABLE >= 1; LOOP_VARIABLE- - ) { STATEMENT;... } 11

12 Nested for Loops The for loop executes one or more statements But the for loop is, itself, a statement That means you can have one for loop inside another for loop This is called a nested loop Here's an example Each loop has its own, distinct, loop variable It s easier to read nested loops from the inside out The innermost loop runs five times to print a message The outmost loop runs the innermost loop tem times Notice the control variable for each loop must be different 12

13 Nested for Loops One more example The inner loop prints the value of the control variable as it goes from 1 to 3 The output loop executes the inner loop 6 times The output is 13

14 New Material Outline Scope The Scope of for Loop Variable Code Block Pseudocode Reusing Existing Code Class Constants 14

15 Scope As programs get longer you have to be careful... that different part of the code do not conflict with each other One way programming languages deal with this problem... is using a concept call scope The scope of a an identifier is the part of the program where it can be used Scope applies to Variables Methods When an variable or method is outside its scope that the compiler does not know about it so it is invisible 15

16 Scope of Static Method The scope of a static method... is the entire class in which it appears So any static method can call any other static method... no matter which comes first... if they are in the same class They can also call static methods in other classes... but then they have to give the class name 16

17 Scope of Static Method In the following code, scope of the static method sayhello... is all the sections of the program shown in red 17

18 Scope of Variable The scope of variables is different In general, the scope of a variable starts where it is declared... and ends which the closing curly brace that encloses it The way to identify the scope of a variable is: find the pair of curly braces that directly encloses the variable declaration the scope is from the point where it s declared to the closing curly brace 18

19 Scope of Variable So in the in the code above the scope of the variable message is shown in light blue... The same variable name can be used in different methods without the compiler becoming confused A variable declared inside a method is called local variables It s a good programing practice to declare variables in the smallest scope possible. This is called localizing variables 19

20 Outline Scope The Scope of for Loop Variable Code Block Pseudocode Reusing Existing Code Class Constants 20

21 The Scope of for Loop Variable The general scope rule for variables does not work for loop variables The scope of a loop variable is The part of the code between the for loop curly braces And the part of the code between the parentheses that starts the loop So the scope of the loop variable i is 21

22 The Scope of for Loop Variable You will get a syntax error if the code is written as follows: 22

23 Outline Scope The Scope of for Loop Variable Code Block Pseudocode Reusing Existing Code Class Constants 23

24 Code Block The part of a Java program between an open curly brace, {... and the matching closing curly brace, }... is called a code block A code block is section of code that is surrounded... by a matched pair of curly braces, { } We can use the idea of a code block to describe the scope of a variable The scope of a variable starts with the line where it is declared... and continues to the end of the code block in which it is declared 24

25 Outline Scope The Scope of for Loop Variable Code Block Pseudocode Reusing Existing Code Class Constants 25

26 Pseudocode When you write more complex algorithms, it s hard to write the entire algorithm immediately One way to deal with this is to use pseudocode When we write pseudocode, we write steps to solve a problem in simple English Then we break down these steps into simpler steps We keep doing this until we have an English description of the steps that can then be translated into Java code 26

27 Pseudocode Suppose we wanted to write a program to print following triangle Our first crack at the pseudocode might look like this draw a downward pointing triangle of 5 lines using asterisks But if you think for a moment, you will realize that this is not enough The following figure is a downward pointing triangle but is not what we want 27

28 Pseudocode So let's refine our pseudocode: draw a downward facing triangle of 5 lines using asterisks with no space between them But the following triangle would also satisfy this description So let's try again draw a downward facing triangle of 5 lines using asterisks with no space between them and the downward sides are of equal length Up to now, we have just refined our description of what needs to be done This is an important first step 28

29 Pseudocode But now we have to start thinking about how we will describe this to the computer using actions it can perform It seems clear we will need a for loop, so let's start with that But each line is different Each line must print a different number of spaces before it prints the asterisks So we need to increase the number of spaces in each line starting with 0 So let's refine our pseudocode 29

30 Pseudocode But once we have the right number of spaces and asterisks... we need to go to the next line So let's try again The next step is to calculate the number of asterisks and spaces... needed for each line If we number the lines 1 through 5... we want the following values for each line 30

31 Pseudocode There is a simple algebraic relationship... between the line number... and the number of spaces and asterisks The number of spaces is equal to the line number minus 1 The number of asterisks is trickier Notice that the number of asterisks decreases by two with each line But what about the first line? If we add 2 to 9 we get 11 So if we start with and subtract 2 at each line... we get the right number of asterisks for each line 31

32 Pseudocode Let's add this to the for loop in our pseudocode The lines to write asterisks and spaces each need a for loop 32

33 Pseudocode Translating this into Java, we get When we run this code we get 33

34 Outline Scope The Scope of for Loop Variable Code Block Pseudocode Reusing Existing Code Class Constants 34

35 Reusing Existing Code Sometimes the easiest way to write a program... is to modify some existing code Let's say you want to write a program to draw the following We might be able to use DrawDownwardTriangle.java instead If you look carefully, you will see that the 1st line of DrawDownwardTriangle... is the same as the 5th line of the figure we want... And so on 35

36 Reusing Existing Code So all we have to do to get the figure we want is change the direction of counting in the outer for loop of DrawDownwardTriangle In DrawDownwardTriangle.java the outer loop counted from 1 to 5 For this code, we want the outer loop to count from 5 to 1 Here is how we do it 36

37 Outline Scope The Scope of for Loop Variable Code Block Pseudocode Reusing Existing Code Class Constants 37

38 Class Constants For the code in DrawCone.java for ( int i = 1; i <= (11 - (2 * line_number)); i++) Someone reading the code for the first time might ask "Why 11?" Programmers call values like this magic numbers They make the program work but it is not clear how Magic numbers make for bad code Whenever we can, we should replace such numbers with an expression... and those expressions should use constants A constant is like a variable except its value cannot be changed 38

39 Class Constants When creating a constant, you must use the keyword final... using the following format final DATA_TYPE CONSTANT_NAME = VALUE; like this final inthours_in_a_day = 24; By convention, constant names are spelled using ALL_CAPITALS The best place to put a constant is inside the class but outside all the methods. Such constants are called class constants. That way they are available to all methods in the class. The format is like this: public static final DATA_TYPE CONSTANT_NAME = VALUE; 39

40 Class Constants So our new version of DrawCone will look like this Add the class constant NUMBER_OF_LINES Change from 5 to NUMBER_OF_LINES Add the variable stars and change the magic number 11 to the expression using the new constant Use the new variable stars in continuation test 40

41 Class 8 Quiz 1. What do you call the series of statements that are executed with each pass through the loop? the loop body 2. What is a code block? all the statements between an open curly brace and the corresponding closing curly brace 3. What is scope? the part of a code in which an identifier (name) has meaning 4. What is the scope of a method? the entire class in which it is defined 41

42 Class 8 Quiz 5. What is the scope of a variable that is not a loop variable? from where it is defined to the end of the code block in which it is defined 6. What is the scope of a loop variable? the parentheses after the keyword for as well as the loop body 7. What is a constant? a "variable" whose value never changes 8. What is the scope of a constant that is not a class constant? the same as a variable. From where it is defined to the end of the code block in which it is defined 42

43 Class 8 Quiz 9. What is the scope of a class constant? The entire class in which it is declared 10. Write the statement that declares the integer constant DAYS_IN_WEEK. public static final int DAYS_IN_WEEK = 7; 43

44 Weekly Quiz1 1. What must the name of the source code file for the Java class CountToTenbe? CountToTen.java 2. If you want to run a Java program from the command line, what must the source code file contain inside the class definition? a main method 3. What is the first line of a method called? method header 4. What is a method? a group of statements that performs a specific task 44

45 Weekly Quiz1 5. Write the Java statement that prints "Hello world!"? System.out.println("Hello world!"); 6. In the previous statement, what does Java call "Hello world!"? a string literal 7. Write the escape sequence for the Tab character? \t 8. Can you use a Java keyword as an identifier? no 45

46 Weekly Quiz1 9. Is 1st_try a valid Java identifier? no 10. Write a one line comment that contains the text "This is a one line comment" // This is a one line comment 46

CS/IT 114 Introduction to Java, Part 1 FALL 2016 CLASS 9: OCT. 4TH INSTRUCTOR: JIAYIN WANG

CS/IT 114 Introduction to Java, Part 1 FALL 2016 CLASS 9: OCT. 4TH INSTRUCTOR: JIAYIN WANG CS/IT 114 Introduction to Java, Part 1 FALL 2016 CLASS 9: OCT. 4TH INSTRUCTOR: JIAYIN WANG 1 Notice Assignments Reading Assignment: Chapter 3: Introduction to Parameters and Objects The Class 9 Exercise

More information

CS/IT 114 Introduction to Java, Part 1 FALL 2016 CLASS 10: OCT. 6TH INSTRUCTOR: JIAYIN WANG

CS/IT 114 Introduction to Java, Part 1 FALL 2016 CLASS 10: OCT. 6TH INSTRUCTOR: JIAYIN WANG CS/IT 114 Introduction to Java, Part 1 FALL 2016 CLASS 10: OCT. 6TH INSTRUCTOR: JIAYIN WANG 1 Notice Assignments Reading Assignment: Chapter 3: Introduction to Parameters and Objects The Class 10 Exercise

More information

CS/IT 114 Introduction to Java, Part 1 FALL 2016 CLASS 3: SEP. 13TH INSTRUCTOR: JIAYIN WANG

CS/IT 114 Introduction to Java, Part 1 FALL 2016 CLASS 3: SEP. 13TH INSTRUCTOR: JIAYIN WANG CS/IT 114 Introduction to Java, Part 1 FALL 2016 CLASS 3: SEP. 13TH INSTRUCTOR: JIAYIN WANG 1 Notice Reading Assignment Chapter 1: Introduction to Java Programming Homework 1 It is due this coming Sunday

More information

Information Science 1

Information Science 1 Topics covered Information Science 1 Terms and concepts from Week 8 Simple calculations Documenting programs Simple Calcula,ons Expressions Arithmetic operators and arithmetic operator precedence Mixed-type

More information

CS/IT 114 Introduction to Java, Part 1 FALL 2016 CLASS 14: OCT. 25TH INSTRUCTOR: JIAYIN WANG

CS/IT 114 Introduction to Java, Part 1 FALL 2016 CLASS 14: OCT. 25TH INSTRUCTOR: JIAYIN WANG CS/IT 114 Introduction to Java, Part 1 FALL 2016 CLASS 14: OCT. 25TH INSTRUCTOR: JIAYIN WANG 1 Notice Assignments No new homework this week. Please make up the homework 1 5 & class exercises this week.

More information

Decision Making in C

Decision Making in C Decision Making in C Decision making structures require that the programmer specify one or more conditions to be evaluated or tested by the program, along with a statement or statements to be executed

More information

Information Science 1

Information Science 1 Information Science 1 Simple Calcula,ons Week 09 College of Information Science and Engineering Ritsumeikan University Topics covered l Terms and concepts from Week 8 l Simple calculations Documenting

More information

Flow Control. CSC215 Lecture

Flow Control. CSC215 Lecture Flow Control CSC215 Lecture Outline Blocks and compound statements Conditional statements if - statement if-else - statement switch - statement? : opertator Nested conditional statements Repetitive statements

More information

Definite Loops. Computer Science S-111 Harvard University David G. Sullivan, Ph.D. Using a Variable for Counting

Definite Loops. Computer Science S-111 Harvard University David G. Sullivan, Ph.D. Using a Variable for Counting Unit 2, Part 2 Definite Loops Computer Science S-111 Harvard University David G. Sullivan, Ph.D. Using a Variable for Counting Let's say that we're using a variable i to count the number of times that

More information

STUDENT OUTLINE. Lesson 8: Structured Programming, Control Structures, if-else Statements, Pseudocode

STUDENT OUTLINE. Lesson 8: Structured Programming, Control Structures, if-else Statements, Pseudocode STUDENT OUTLINE Lesson 8: Structured Programming, Control Structures, if- Statements, Pseudocode INTRODUCTION: This lesson is the first of four covering the standard control structures of a high-level

More information

Building Java Programs Chapter 2

Building Java Programs Chapter 2 Building Java Programs Chapter 2 Primitive Data and Definite Loops Copyright (c) Pearson 2013. All rights reserved. Data types type: A category or set of data values. Constrains the operations that can

More information

Repe$$on CSC 121 Fall 2015 Howard Rosenthal

Repe$$on CSC 121 Fall 2015 Howard Rosenthal Repe$$on CSC 121 Fall 2015 Howard Rosenthal Lesson Goals Learn the following three repetition methods, their similarities and differences, and how to avoid common errors when using them: while do-while

More information

Java Programming Fundamentals - Day Instructor: Jason Yoon Website:

Java Programming Fundamentals - Day Instructor: Jason Yoon Website: Java Programming Fundamentals - Day 1 07.09.2016 Instructor: Jason Yoon Website: http://mryoon.weebly.com Quick Advice Before We Get Started Java is not the same as javascript! Don t get them confused

More information

Building Java Programs Chapter 2. bug. Primitive Data and Definite Loops. Copyright (c) Pearson All rights reserved. Software Flaw.

Building Java Programs Chapter 2. bug. Primitive Data and Definite Loops. Copyright (c) Pearson All rights reserved. Software Flaw. Building Java Programs Chapter 2 bug Primitive Data and Definite Loops Copyright (c) Pearson 2013. All rights reserved. 2 An Insect Software Flaw 3 4 Bug, Kentucky Bug Eyed 5 Cheesy Movie 6 Punch Buggy

More information

Building Java Programs Chapter 2

Building Java Programs Chapter 2 Building Java Programs Chapter 2 Primitive Data and Definite Loops Copyright (c) Pearson 2013. All rights reserved. bug 2 An Insect 3 Software Flaw 4 Bug, Kentucky 5 Bug Eyed 6 Cheesy Movie 7 Punch Buggy

More information

Building Java Programs

Building Java Programs Building Java Programs Chapter 2: Primitive Data and Definite Loops These lecture notes are copyright (C) Marty Stepp and Stuart Reges, 2007. They may not be rehosted, sold, or modified without expressed

More information

Information Science 1

Information Science 1 Topics covered Information Science 1 Fundamental Programming Constructs (1) Week 11 Terms and concepts from Week 10 Flow of control and conditional statements Selection structures if statement switch statement

More information

CS 112 Introduction to Computing II. Wayne Snyder Computer Science Department Boston University

CS 112 Introduction to Computing II. Wayne Snyder Computer Science Department Boston University CS 112 Introduction to Computing II Wayne Snyder Department Boston University Today: Java expressions and operators concluded Java Statements: Conditionals: if/then, if/then/else Loops: while, for Next

More information

Repe$$on CSC 121 Spring 2017 Howard Rosenthal

Repe$$on CSC 121 Spring 2017 Howard Rosenthal Repe$$on CSC 121 Spring 2017 Howard Rosenthal Lesson Goals Learn the following three repetition structures in Java, their syntax, their similarities and differences, and how to avoid common errors when

More information

CS/IT 114 Introduction to Java, Part 1 FALL 2016 CLASS 2: SEP. 8TH INSTRUCTOR: JIAYIN WANG

CS/IT 114 Introduction to Java, Part 1 FALL 2016 CLASS 2: SEP. 8TH INSTRUCTOR: JIAYIN WANG CS/IT 114 Introduction to Java, Part 1 FALL 2016 CLASS 2: SEP. 8TH INSTRUCTOR: JIAYIN WANG 1 Notice Class Website http://www.cs.umb.edu/~jane/cs114/ Reading Assignment Chapter 1: Introduction to Java Programming

More information

Repetition Structures

Repetition Structures Repetition Structures Chapter 5 Fall 2016, CSUS Introduction to Repetition Structures Chapter 5.1 1 Introduction to Repetition Structures A repetition structure causes a statement or set of statements

More information

Programming Lecture 4

Programming Lecture 4 Five-Minute Review 1. What are classes and objects? What is a class hierarchy? 2. What is an expression? A term? 3. What is a variable declaration? 4. What is an assignment? What is precedence? 5. What

More information

Introduction. C provides two styles of flow control:

Introduction. C provides two styles of flow control: Introduction C provides two styles of flow control: Branching Looping Branching is deciding what actions to take and looping is deciding how many times to take a certain action. Branching constructs: if

More information

Slide 1 CS 170 Java Programming 1 The Switch Duration: 00:00:46 Advance mode: Auto

Slide 1 CS 170 Java Programming 1 The Switch Duration: 00:00:46 Advance mode: Auto CS 170 Java Programming 1 The Switch Slide 1 CS 170 Java Programming 1 The Switch Duration: 00:00:46 Menu-Style Code With ladder-style if-else else-if, you might sometimes find yourself writing menu-style

More information

Information Science 1

Information Science 1 Information Science 1 Fundamental Programming Constructs (1) Week 11 College of Information Science and Engineering Ritsumeikan University Topics covered l Terms and concepts from Week 10 l Flow of control

More information

CS110D: PROGRAMMING LANGUAGE I

CS110D: PROGRAMMING LANGUAGE I CS110D: PROGRAMMING LANGUAGE I Computer Science department Lecture 5&6: Loops Lecture Contents Why loops?? While loops for loops do while loops Nested control structures Motivation Suppose that you need

More information

Control Flow. COMS W1007 Introduction to Computer Science. Christopher Conway 3 June 2003

Control Flow. COMS W1007 Introduction to Computer Science. Christopher Conway 3 June 2003 Control Flow COMS W1007 Introduction to Computer Science Christopher Conway 3 June 2003 Overflow from Last Time: Why Types? Assembly code is typeless. You can take any 32 bits in memory, say this is an

More information

5. Control Statements

5. Control Statements 5. Control Statements This section of the course will introduce you to the major control statements in C++. These control statements are used to specify the branching in an algorithm/recipe. Control statements

More information

Chapter 17. Fundamental Concepts Expressed in JavaScript

Chapter 17. Fundamental Concepts Expressed in JavaScript Chapter 17 Fundamental Concepts Expressed in JavaScript Learning Objectives Tell the difference between name, value, and variable List three basic data types and the rules for specifying them in a program

More information

Operators. Java operators are classified into three categories:

Operators. Java operators are classified into three categories: Operators Operators are symbols that perform arithmetic and logical operations on operands and provide a meaningful result. Operands are data values (variables or constants) which are involved in operations.

More information

Recap: Assignment as an Operator CS 112 Introduction to Programming

Recap: Assignment as an Operator CS 112 Introduction to Programming Recap: Assignment as an Operator CS 112 Introduction to Programming q You can consider assignment as an operator, with a (Spring 2012) lower precedence than the arithmetic operators First the expression

More information

Full file at

Full file at Java Programming: From Problem Analysis to Program Design, 3 rd Edition 2-1 Chapter 2 Basic Elements of Java At a Glance Instructor s Manual Table of Contents Overview Objectives s Quick Quizzes Class

More information

Condition-Controlled Loop. Condition-Controlled Loop. If Statement. Various Forms. Conditional-Controlled Loop. Loop Caution.

Condition-Controlled Loop. Condition-Controlled Loop. If Statement. Various Forms. Conditional-Controlled Loop. Loop Caution. Repetition Structures Introduction to Repetition Structures Chapter 5 Spring 2016, CSUS Chapter 5.1 Introduction to Repetition Structures The Problems with Duplicate Code A repetition structure causes

More information

Course Outline. Introduction to java

Course Outline. Introduction to java Course Outline 1. Introduction to OO programming 2. Language Basics Syntax and Semantics 3. Algorithms, stepwise refinements. 4. Quiz/Assignment ( 5. Repetitions (for loops) 6. Writing simple classes 7.

More information

CpSc 1111 Lab 4 Part a Flow Control, Branching, and Formatting

CpSc 1111 Lab 4 Part a Flow Control, Branching, and Formatting CpSc 1111 Lab 4 Part a Flow Control, Branching, and Formatting Your factors.c and multtable.c files are due by Wednesday, 11:59 pm, to be submitted on the SoC handin page at http://handin.cs.clemson.edu.

More information

REPETITION CONTROL STRUCTURE LOGO

REPETITION CONTROL STRUCTURE LOGO CSC 128: FUNDAMENTALS OF COMPUTER PROBLEM SOLVING REPETITION CONTROL STRUCTURE 1 Contents 1 Introduction 2 for loop 3 while loop 4 do while loop 2 Introduction It is used when a statement or a block of

More information

Programming Logic and Design Seventh Edition Chapter 2 Elements of High-Quality Programs

Programming Logic and Design Seventh Edition Chapter 2 Elements of High-Quality Programs Programming Logic and Design Chapter 2 Elements of High-Quality Programs Objectives In this chapter, you will learn about: Declaring and using variables and constants Assigning values to variables [assignment

More information

CS 106 Introduction to Computer Science I

CS 106 Introduction to Computer Science I CS 106 Introduction to Computer Science I 05 / 31 / 2017 Instructor: Michael Eckmann Today s Topics Questions / Comments? recap and some more details about variables, and if / else statements do lab work

More information

Programming Lecture 4

Programming Lecture 4 Five-Minute Review 1. What is a class hierarchy? 2. Which graphical coordinate system is used by Java (and most other languages)? 3. Why is a collage a good methapher for GObjects? 4. What is a CFG? What

More information

The for Loop. Lesson 11

The for Loop. Lesson 11 The for Loop Lesson 11 Have you ever played Tetris? You know that the game never truly ends. Blocks continue to fall one at a time, increasing in speed as you go up in levels, until the game breaks from

More information

12/22/11. Java How to Program, 9/e. Help you get started with Eclipse and NetBeans integrated development environments.

12/22/11. Java How to Program, 9/e. Help you get started with Eclipse and NetBeans integrated development environments. Java How to Program, 9/e Education, Inc. All Rights Reserved. } Java application programming } Use tools from the JDK to compile and run programs. } Videos at www.deitel.com/books/jhtp9/ Help you get started

More information

IT 374 C# and Applications/ IT695 C# Data Structures

IT 374 C# and Applications/ IT695 C# Data Structures IT 374 C# and Applications/ IT695 C# Data Structures Module 2.1: Introduction to C# App Programming Xianrong (Shawn) Zheng Spring 2017 1 Outline Introduction Creating a Simple App String Interpolation

More information

CS 112 Introduction to Programming

CS 112 Introduction to Programming CS 112 Introduction to Programming (Spring 2012) Lecture #7: Variable Scope, Constants, and Loops Zhong Shao Department of Computer Science Yale University Office: 314 Watson http://flint.cs.yale.edu/cs112

More information

Expressions and Data Types CSC 121 Spring 2015 Howard Rosenthal

Expressions and Data Types CSC 121 Spring 2015 Howard Rosenthal Expressions and Data Types CSC 121 Spring 2015 Howard Rosenthal Lesson Goals Understand the basic constructs of a Java Program Understand how to use basic identifiers Understand simple Java data types

More information

Expressions and Data Types CSC 121 Fall 2015 Howard Rosenthal

Expressions and Data Types CSC 121 Fall 2015 Howard Rosenthal Expressions and Data Types CSC 121 Fall 2015 Howard Rosenthal Lesson Goals Understand the basic constructs of a Java Program Understand how to use basic identifiers Understand simple Java data types and

More information

The simplest way to evaluate the expression is simply to start at the left and work your way across, keeping track of the total as you go:

The simplest way to evaluate the expression is simply to start at the left and work your way across, keeping track of the total as you go: ck 12 Chapter 1 Order of Operations Learning Objectives Evaluate algebraic expressions with grouping symbols. Evaluate algebraic expressions with fraction bars. Evaluate algebraic expressions with a graphing

More information

More Flow Control Functions in C++ CS 16: Solving Problems with Computers I Lecture #4

More Flow Control Functions in C++ CS 16: Solving Problems with Computers I Lecture #4 More Flow Control Functions in C++ CS 16: Solving Problems with Computers I Lecture #4 Ziad Matni Dept. of Computer Science, UCSB Administrative CHANGED T.A. OFFICE/OPEN LAB HOURS! Thursday, 10 AM 12 PM

More information

Chapter 3. More Flow of Control. Copyright 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley

Chapter 3. More Flow of Control. Copyright 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Chapter 3 More Flow of Control Overview 3.1 Using Boolean Expressions 3.2 Multiway Branches 3.3 More about C++ Loop Statements 3.4 Designing Loops Slide 3-3 Flow Of Control Flow of control refers to the

More information

Introduction to Software Development (ISD) Week 3

Introduction to Software Development (ISD) Week 3 Introduction to Software Development (ISD) Week 3 Autumn term 2012 Aims of Week 3 To learn about while, for, and do loops To understand and use nested loops To implement programs that read and process

More information

Repetition with for loops

Repetition with for loops Repetition with for loops So far, when we wanted to perform a task multiple times, we have written redundant code: System.out.println( Building Java Programs ); // print 5 blank lines System.out.println(

More information

CSc Introduction to Computing

CSc Introduction to Computing CSc 10200 Introduction to Computing Lecture 2 Edgardo Molina Fall 2011 - City College of New York Thursday, September 1, 2011 Introduction to C++ Modular program: A program consisting of interrelated segments

More information

Lab # 2. For today s lab:

Lab # 2. For today s lab: 1 ITI 1120 Lab # 2 Contributors: G. Arbez, M. Eid, D. Inkpen, A. Williams, D. Amyot 1 For today s lab: Go the course webpage Follow the links to the lab notes for Lab 2. Save all the java programs you

More information

CSc 10200! Introduction to Computing. Lecture 2-3 Edgardo Molina Fall 2013 City College of New York

CSc 10200! Introduction to Computing. Lecture 2-3 Edgardo Molina Fall 2013 City College of New York CSc 10200! Introduction to Computing Lecture 2-3 Edgardo Molina Fall 2013 City College of New York 1 C++ for Engineers and Scientists Third Edition Chapter 2 Problem Solving Using C++ 2 Objectives In this

More information

CS 374 Fall 2014 Homework 2 Due Tuesday, September 16, 2014 at noon

CS 374 Fall 2014 Homework 2 Due Tuesday, September 16, 2014 at noon CS 374 Fall 2014 Homework 2 Due Tuesday, September 16, 2014 at noon Groups of up to three students may submit common solutions for each problem in this homework and in all future homeworks You are responsible

More information

C: How to Program. Week /Mar/05

C: How to Program. Week /Mar/05 1 C: How to Program Week 2 2007/Mar/05 Chapter 2 - Introduction to C Programming 2 Outline 2.1 Introduction 2.2 A Simple C Program: Printing a Line of Text 2.3 Another Simple C Program: Adding Two Integers

More information

CS 112 Introduction to Computing II. Wayne Snyder Computer Science Department Boston University

CS 112 Introduction to Computing II. Wayne Snyder Computer Science Department Boston University CS 112 Introduction to Computing II Wayne Snyder Department Boston University Today: Java basics: Compilation vs Interpretation Program structure Statements Values Variables Types Operators and Expressions

More information

BASIC COMPUTATION. public static void main(string [] args) Fundamentals of Computer Science I

BASIC COMPUTATION. public static void main(string [] args) Fundamentals of Computer Science I BASIC COMPUTATION x public static void main(string [] args) Fundamentals of Computer Science I Outline Using Eclipse Data Types Variables Primitive and Class Data Types Expressions Declaration Assignment

More information

1. The programming language C is more than 30 years old. True or False? (Circle your choice.)

1. The programming language C is more than 30 years old. True or False? (Circle your choice.) Name: Section: Grade: Answer these questions while viewing the assigned videos. Not sure of an answer? Ask your instructor to explain at the beginning of the next class session. You can then fill in your

More information

TOPIC 2 INTRODUCTION TO JAVA AND DR JAVA

TOPIC 2 INTRODUCTION TO JAVA AND DR JAVA 1 TOPIC 2 INTRODUCTION TO JAVA AND DR JAVA Notes adapted from Introduction to Computing and Programming with Java: A Multimedia Approach by M. Guzdial and B. Ericson, and instructor materials prepared

More information

Following is the general form of a typical decision making structure found in most of the programming languages:

Following is the general form of a typical decision making structure found in most of the programming languages: Decision Making Decision making structures have one or more conditions to be evaluated or tested by the program, along with a statement or statements that are to be executed if the condition is determined

More information

CSI33 Data Structures

CSI33 Data Structures Outline Department of Mathematics and Computer Science Bronx Community College October 24, 2018 Outline Outline 1 Chapter 8: A C++ Introduction For Python Programmers Expressions and Operator Precedence

More information

Lecture 05 I/O statements Printf, Scanf Simple statements, Compound statements

Lecture 05 I/O statements Printf, Scanf Simple statements, Compound statements Programming, Data Structures and Algorithms Prof. Shankar Balachandran Department of Computer Science and Engineering Indian Institute of Technology, Madras Lecture 05 I/O statements Printf, Scanf Simple

More information

Computer Science II Lecture 1 Introduction and Background

Computer Science II Lecture 1 Introduction and Background Computer Science II Lecture 1 Introduction and Background Discussion of Syllabus Instructor, TAs, office hours Course web site, http://www.cs.rpi.edu/courses/fall04/cs2, will be up soon Course emphasis,

More information

1 Lexical Considerations

1 Lexical Considerations Massachusetts Institute of Technology Department of Electrical Engineering and Computer Science 6.035, Spring 2013 Handout Decaf Language Thursday, Feb 7 The project for the course is to write a compiler

More information

Object Oriented Software Design

Object Oriented Software Design Object Oriented Software Design Introduction to Java - II Giuseppe Lipari http://retis.sssup.it/~lipari Scuola Superiore Sant Anna Pisa September 30, 2010 G. Lipari (Scuola Superiore Sant Anna) Introduction

More information

QUIZ Friends class Y;

QUIZ Friends class Y; QUIZ Friends class Y; Is a forward declaration neeed here? QUIZ Friends QUIZ Friends - CONCLUSION Forward (a.k.a. incomplete) declarations are needed only when we declare member functions as friends. They

More information

Computer Programming : C++

Computer Programming : C++ The Islamic University of Gaza Engineering Faculty Department of Computer Engineering Fall 2017 ECOM 2003 Muath i.alnabris Computer Programming : C++ Experiment #1 Basics Contents Structure of a program

More information

CSE 142. Lecture 1 Course Introduction; Basic Java. Portions Copyright 2008 by Pearson Education

CSE 142. Lecture 1 Course Introduction; Basic Java. Portions Copyright 2008 by Pearson Education CSE 142 Lecture 1 Course Introduction; Basic Java Welcome Today: Course mechanics A little about computer science & engineering (CSE) And how this course relates Java programs that print text 2 Handouts

More information

CHRIST THE KING BOYS MATRIC HR. SEC. SCHOOL, KUMBAKONAM CHAPTER 9 C++

CHRIST THE KING BOYS MATRIC HR. SEC. SCHOOL, KUMBAKONAM CHAPTER 9 C++ CHAPTER 9 C++ 1. WRITE ABOUT THE BINARY OPERATORS USED IN C++? ARITHMETIC OPERATORS: Arithmetic operators perform simple arithmetic operations like addition, subtraction, multiplication, division etc.,

More information

3 The L oop Control Structure

3 The L oop Control Structure 3 The L oop Control Structure Loops The while Loop Tips and Traps More Operators The for Loop Nesting of Loops Multiple Initialisations in the for Loop The Odd Loop The break Statement The continue Statement

More information

Quiz 1: Functions and Procedures

Quiz 1: Functions and Procedures Quiz 1: Functions and Procedures Outline Basics Control Flow While Loops Expressions and Statements Functions Primitive Data Types 3 simple data types: number, string, boolean Numbers store numerical data

More information

CS1622. Semantic Analysis. The Compiler So Far. Lecture 15 Semantic Analysis. How to build symbol tables How to use them to find

CS1622. Semantic Analysis. The Compiler So Far. Lecture 15 Semantic Analysis. How to build symbol tables How to use them to find CS1622 Lecture 15 Semantic Analysis CS 1622 Lecture 15 1 Semantic Analysis How to build symbol tables How to use them to find multiply-declared and undeclared variables. How to perform type checking CS

More information

switch case Logic Syntax Basics Functionality Rules Nested switch switch case Comp Sci 1570 Introduction to C++

switch case Logic Syntax Basics Functionality Rules Nested switch switch case Comp Sci 1570 Introduction to C++ Comp Sci 1570 Introduction to C++ Outline 1 Outline 1 Outline 1 switch ( e x p r e s s i o n ) { case c o n s t a n t 1 : group of statements 1; break ; case c o n s t a n t 2 : group of statements 2;

More information

CS 231 Data Structures and Algorithms, Fall 2016

CS 231 Data Structures and Algorithms, Fall 2016 CS 231 Data Structures and Algorithms, Fall 2016 Dr. Bruce A. Maxwell Department of Computer Science Colby College Course Description Focuses on the common structures used to store data and the standard

More information

Basics of Java Programming

Basics of Java Programming Basics of Java Programming Lecture 2 COP 3252 Summer 2017 May 16, 2017 Components of a Java Program statements - A statement is some action or sequence of actions, given as a command in code. A statement

More information

Repetition CSC 121 Fall 2014 Howard Rosenthal

Repetition CSC 121 Fall 2014 Howard Rosenthal Repetition CSC 121 Fall 2014 Howard Rosenthal Lesson Goals Learn the following three repetition methods, their similarities and differences, and how to avoid common errors when using them: while do-while

More information

DATA AND ABSTRACTION. Today you will learn : How to work with variables How to break a program down Good program design

DATA AND ABSTRACTION. Today you will learn : How to work with variables How to break a program down Good program design DATA AND ABSTRACTION Today you will learn : How to work with variables How to break a program down Good program design VARIABLES Variables are a named memory location Before you use a variable you must

More information

} Evaluate the following expressions: 1. int x = 5 / 2 + 2; 2. int x = / 2; 3. int x = 5 / ; 4. double x = 5 / 2.

} Evaluate the following expressions: 1. int x = 5 / 2 + 2; 2. int x = / 2; 3. int x = 5 / ; 4. double x = 5 / 2. Class #10: Understanding Primitives and Assignments Software Design I (CS 120): M. Allen, 19 Sep. 18 Java Arithmetic } Evaluate the following expressions: 1. int x = 5 / 2 + 2; 2. int x = 2 + 5 / 2; 3.

More information

Datatypes, Variables, and Operations

Datatypes, Variables, and Operations Datatypes, Variables, and Operations 1 Primitive Type Classification 2 Numerical Data Types Name Range Storage Size byte 2 7 to 2 7 1 (-128 to 127) 8-bit signed short 2 15 to 2 15 1 (-32768 to 32767) 16-bit

More information

Chapter 5. Repetition. Contents. Introduction. Three Types of Program Control. Two Types of Repetition. Three Syntax Structures for Looping in C++

Chapter 5. Repetition. Contents. Introduction. Three Types of Program Control. Two Types of Repetition. Three Syntax Structures for Looping in C++ Repetition Contents 1 Repetition 1.1 Introduction 1.2 Three Types of Program Control Chapter 5 Introduction 1.3 Two Types of Repetition 1.4 Three Structures for Looping in C++ 1.5 The while Control Structure

More information

DECISION STRUCTURES: USING IF STATEMENTS IN JAVA

DECISION STRUCTURES: USING IF STATEMENTS IN JAVA DECISION STRUCTURES: USING IF STATEMENTS IN JAVA S o far all the programs we have created run straight through from start to finish, without making any decisions along the way. Many times, however, you

More information

Introduction to C Programming

Introduction to C Programming 1 2 Introduction to C Programming 2.6 Decision Making: Equality and Relational Operators 2 Executable statements Perform actions (calculations, input/output of data) Perform decisions - May want to print

More information

Software Design & Programming I

Software Design & Programming I Software Design & Programming I Starting Out with C++ (From Control Structures through Objects) 7th Edition Written by: Tony Gaddis Pearson - Addison Wesley ISBN: 13-978-0-132-57625-3 Chapter 4 Making

More information

Selec%on and Decision Structures in Java: If Statements and Switch Statements CSC 121 Spring 2016 Howard Rosenthal

Selec%on and Decision Structures in Java: If Statements and Switch Statements CSC 121 Spring 2016 Howard Rosenthal Selec%on and Decision Structures in Java: If Statements and Switch Statements CSC 121 Spring 2016 Howard Rosenthal Lesson Goals Understand Control Structures Understand how to control the flow of a program

More information

Program Development. Java Program Statements. Design. Requirements. Testing. Implementation

Program Development. Java Program Statements. Design. Requirements. Testing. Implementation Program Development Java Program Statements Selim Aksoy Bilkent University Department of Computer Engineering saksoy@cs.bilkent.edu.tr The creation of software involves four basic activities: establishing

More information

Full file at C How to Program, 6/e Multiple Choice Test Bank

Full file at   C How to Program, 6/e Multiple Choice Test Bank 2.1 Introduction 2.2 A Simple Program: Printing a Line of Text 2.1 Lines beginning with let the computer know that the rest of the line is a comment. (a) /* (b) ** (c) REM (d)

More information

Primitive data, expressions, and variables

Primitive data, expressions, and variables How the computer sees the world Primitive data, expressions, and variables Readings:.. Internally, the computer stores everything in terms of s and 0 s Example: h 0000 "hi" 0000000 0 0000 How can the computer

More information

Loops (while and for)

Loops (while and for) Loops (while and for) CSE 1310 Introduction to Computers and Programming Alexandra Stefan 1 Motivation Was there any program we did (class or hw) where you wanted to repeat an action? 2 Motivation Name

More information

CONTENTS: What Is Programming? How a Computer Works Programming Languages Java Basics. COMP-202 Unit 1: Introduction

CONTENTS: What Is Programming? How a Computer Works Programming Languages Java Basics. COMP-202 Unit 1: Introduction CONTENTS: What Is Programming? How a Computer Works Programming Languages Java Basics COMP-202 Unit 1: Introduction Announcements Did you miss the first lecture? Come talk to me after class. If you want

More information

Introduction to Programming in C Department of Computer Science and Engineering. Lecture No. #16 Loops: Matrix Using Nested for Loop

Introduction to Programming in C Department of Computer Science and Engineering. Lecture No. #16 Loops: Matrix Using Nested for Loop Introduction to Programming in C Department of Computer Science and Engineering Lecture No. #16 Loops: Matrix Using Nested for Loop In this section, we will use the, for loop to code of the matrix problem.

More information

We have written lots of code so far It has all been inside of the main() method What about a big program? The main() method is going to get really

We have written lots of code so far It has all been inside of the main() method What about a big program? The main() method is going to get really Week 9: Methods 1 We have written lots of code so far It has all been inside of the main() method What about a big program? The main() method is going to get really long and hard to read Sometimes you

More information

Assoc. Prof. Dr. Marenglen Biba. (C) 2010 Pearson Education, Inc. All rights reserved.

Assoc. Prof. Dr. Marenglen Biba. (C) 2010 Pearson Education, Inc. All rights reserved. Assoc. Prof. Dr. Marenglen Biba Before writing a program to solve a problem, have a thorough understanding of the problem and a carefully planned approach to solving it. Understand the types of building

More information

Mobile Computing Professor Pushpendra Singh Indraprastha Institute of Information Technology Delhi Java Basics Lecture 02

Mobile Computing Professor Pushpendra Singh Indraprastha Institute of Information Technology Delhi Java Basics Lecture 02 Mobile Computing Professor Pushpendra Singh Indraprastha Institute of Information Technology Delhi Java Basics Lecture 02 Hello, in this lecture we will learn about some fundamentals concepts of java.

More information

QUIZ on Ch.5. Why is it sometimes not a good idea to place the private part of the interface in a header file?

QUIZ on Ch.5. Why is it sometimes not a good idea to place the private part of the interface in a header file? QUIZ on Ch.5 Why is it sometimes not a good idea to place the private part of the interface in a header file? Example projects where we don t want the implementation visible to the client programmer: The

More information

printf( Please enter another number: ); scanf( %d, &num2);

printf( Please enter another number: ); scanf( %d, &num2); CIT 593 Intro to Computer Systems Lecture #13 (11/1/12) Now that we've looked at how an assembly language program runs on a computer, we're ready to move up a level and start working with more powerful

More information

Selec%on and Decision Structures in Java: If Statements and Switch Statements CSC 121 Fall 2016 Howard Rosenthal

Selec%on and Decision Structures in Java: If Statements and Switch Statements CSC 121 Fall 2016 Howard Rosenthal Selec%on and Decision Structures in Java: If Statements and Switch Statements CSC 121 Fall 2016 Howard Rosenthal Lesson Goals Understand Control Structures Understand how to control the flow of a program

More information

Java How to Program, 9/e. Copyright by Pearson Education, Inc. All Rights Reserved.

Java How to Program, 9/e. Copyright by Pearson Education, Inc. All Rights Reserved. Java How to Program, 9/e Copyright 1992-2012 by Pearson Education, Inc. All Rights Reserved. Copyright 1992-2012 by Pearson Copyright 1992-2012 by Pearson Before writing a program to solve a problem, have

More information

Sudoku-4: Logical Structure

Sudoku-4: Logical Structure Sudoku-4: Logical Structure CSCI 4526 / 6626 Fall 2016 1 Goals To use an STL vector. To use an enumerated type. To learn about tightly coupled classes. To learn about circular dependencies. To use the

More information

CT 229 Java Syntax Continued

CT 229 Java Syntax Continued CT 229 Java Syntax Continued 29/09/2006 CT229 Lab Assignments One Week Extension for Lab Assignment 1. Due Date: Oct 8 th Before submission make sure that the name of each.java file matches the name given

More information

Control Structures. Code can be purely arithmetic assignments. At some point we will need some kind of control or decision making process to occur

Control Structures. Code can be purely arithmetic assignments. At some point we will need some kind of control or decision making process to occur Control Structures Code can be purely arithmetic assignments At some point we will need some kind of control or decision making process to occur C uses the if keyword as part of it s control structure

More information