# WEEK 4 OPERATORS, EXPRESSIONS AND STATEMENTS

Size: px
Start display at page:

Transcription

1 WEEK 4 OPERATORS, EXPRESSIONS AND STATEMENTS OPERATORS Review: Data values can appear as literals or be stored in variables/constants Data values can be returned by method calls Operators: special symbols that operate on their operands and return a result. Data values can be combined into expression using operators Eg. 12 * 2 is an expression that returns 24. o The operator is * o The operands are 12 and 2 o The result is 24 Expressions evaluate to a single value. This value must have a data type The resulting data type depends on the data types of the operands What do we use expression for? Arithmetic - mathematic calculations String manipulation - combining/changing strings Assignment - '=' is also an operator Comparison - these kinds of expression return the Boolean values Operator precedence list: a list that decides which operator operates first. THE ASSIGNMENT OPERATOR Assignment statement: an expression that is terminated by a ';' 1. The assignment operator has the LOWEST PRECENDENCE of all operators, because the RHS must be fully evaluated before it can be stored. 2. Assignment operators returns whatever value is on the RHS. ARITHMETIC OPERATORS Operation Operator Example expression Return value Addition Subtraction Multiplication * 1.5 * Division / 1.0 / / Remainder % 7 % 3 1

2 Integer division VS floating-point division If BOTH operands are integers the operation is integer division Return value = truncated integer If ONE operand is a double, and the other is an integer the operation is floating-point division A copy of the integer's value is AUTO-PROMOTED to a double Return value = double type If BOTH operands are integers you can CAST one operand to double and the auto-promotion of the other operand will cause floating-point division '++' and '--' The following statements are equivalent if they appear as standalone statements: count = count + 1; ++count; count++; Pre-increment Post-increment count = count - 1; --count; count--; Pre-decrement Post-decrement For x = 1 and y = 2; Expression Return value x after y after Explanation x + ++y y is incremented from 2 to 3, y is added to x. x + y y is added to x, which is returned, then y is incremented from 2 to 3 x + --y y is decremented from 2 to 1, y is added to x. x + y y is added to x, which is returned, then y is decremented by 1. Note: don't use post-increment and post-decrement when writing code, because they get confusing. But understand them in other code.

3 COMPOUND OPERATORS Using compound operator total += number total -= number total *= number total /= number total %= number Long equivalent total = total + number total = total - number total = total * number total = total / number total = total % number Compound operators are often used for accumulating a sum/string THE MATH CLASS The Math class: contains many mathematical functions, such trigonometry, absolute, exponential and roots Eg. Math.floor(pi); //returns The Math class is always available in Java code a. The math class is in a package in the Java Class Library (java.lang). b. THE MATH CLASS NEVER NEEDS TO BE "IMPORTED" (neither does the String class) 2. The Math class prevents instantiation of math objects a. It can be invoked on the Class itself b. Math is 'static', it's in the application driver. OPERATOR PRECENDENCE BODMAS: Brackets, Orders, Division, Multiplication, Addition, Subtraction Parentheses can be nested - the expression within the INNERMOST level of parenthesis is evaluated first. The following operators have equal precedence: Division and multiplication Addition and subtraction The leftmost operator has the highest precedence EXCEPTION - the assignment operator associated from right to left. Good style - programmers use parentheses to explicitly and completely specify the order of operations. Why? The programmer doesn't have to remember the operator precedence rules.

4 EQUALITY AND RELATIONAL OPERATORS Equality and relational operators: operate on numeric and String operands, and return Boolean results. Ordering of numeric values: We can establish relativity between values because we assume an ordering of value This is self-evident. Ordering of String values: String values are compared by right-padding the shorter values with spaces to make the comparative values the same length Then, a left-to-right character-by-character comparison is made It is based on the characters' Unicode integer value Space has the lowest Unicode integer value Unicode ordering: Space < 1 < 2 < 3 < A < B < C < < a < b < c < Case-sensitivity: 'A' and 'a' are not the same. Punctuation characters are placed unpredictably between the digits and numbers Eg. "abcdefghij" compared to "abcd" 1. Right-pad the shorter value: "abcdefghij" VS "abcd " 2. Character-by-character comparison: "a" vs "a", "b" vs "b", "C" vs "c" - "C" is smaller, therefore "abcdefghij" is the smaller value. Control structure conditions: Structures that control the sequence in which statements are executed rely on Boolean expressions, called conditions to decide which statement to execute next. Operator Java symbol Equality == Inequality!= Relational: Less than Less than or equal to More than More than or equal to < <= > >= Precedence: Relational (<, >) come before '==' and '!=' When comparing two floating-point values, it is best to allow for small inaccuracies. double d1 = 1.23, d2 = 3.45; double delta = ; mywindow.writeoutline((d2 - d1) < delta); //false

5 Equality and Inequality with Strings: String s1 = "dog", s2; s2 = mywindow.readin(); //assume user types in 'dog' mywindow.writeoutline("s1 == s2: "+(s1 == s2)); //false Problem: both String variables, s1 and s2, are set with the same value. However, Java judged them unequal String is a reference type, not a primitive type When two string variables are compared with the equality/inequality operators, Java asks the question: "are they stored at the same location in memory or not?" Instead of "are they the same value?" STRING VALUES CANNOT BE COMPARED WITH THE '==' / '!=' OPERATORS Side notes about reference types: A reference variable's value is actually an address to its value, not the value itself. If you set two variables in code with the same String value, the Java compiler will only store it once and reference it twice Relational operators with Strings: Java will syntactically prevent relational operators from taking String operands. o You cannot run the expression: "abcd" < "ABCD"; Instead, we use some functions from the String class String s1 = "dog", s2, s3 = "dog", s4 = "dogs!"; s2 = mywindow.readin(); //assume user types in 'dog' Function Explanation Return value s1.equals(s2) s1 == s2 true!s1.equals(s2) Not (s1 == s2) false s1.equalsignorecase(s3) Compares s1 and s3, ignoring case considerations. True s1.compareto(s4) Compares s1 and s4, lexicographically*. Returns the difference of the two character values. It is negative, because s1 is smaller than s4. -2 (negative value) s4.compareto(s1) s1.compareto(s2) Returns a positive value, because s4 is bigger than s1 Returns 0, because both values are equal 2 (positive value) 0

6 s1.comparetoignorecase(s3) Compares s1 and s3 lexicographically, but ignore the case differences. 32 (positive value) LOGICAL OPERATORS Operator Java symbol Not! And && Or Precendence:! < && < Truth tables: Not B1!B1 True False False True And B1 B2 B1 && B2 True True True True False False False True False False False False Or B1 B2 B1 B2 True True True True False True False True True False False False Example of combinations:

7 Write an expression that tells you whether a value is in the range of 50 and 100, called inrangetest. int low = 50, high = 100; int testvalue1 = 99, testvalue2 = 101; boolean inrangetest1, inrangetest2; inrangetest1 = testvalue1 >= low && testvalue1 <= high; inrangetest2 = testvalue2 >= low && testvalue2 <= high; Short circuiting: The '&&' and ' ' operates are short circuit operators. This means that o For '&&', if the left-hand operand is false, then the right-hand operand is not evaluated, and the return value is automatically false. o For ' ', if the left-hand operand is true, then the right-hand operand is not evaluated, and the return value is automatically true. Some programmers use short-circuiting to invoke/not invoke a method call, depending on the left-hand operand. Redundant syntax: Boolean expressions that look like this myboolean == true; myboolean == false; Should be coded like this myboolean;!myboolean; OPERATOR PRECEDENCE The four different types of operators are: 1. Arithmetic (+, -, /, %, *) 2. Relational (<, >) 3. Equality, inequality (=,!=) 4. Logical (&&,,!) Precedence: Arithmetic < Relational < Equality/Inequality < Logical EXPRESSIONS AND STATEMENTS Expression: any syntactically legal combination of variables, constants, literals, method calls and operators that evaluate to a single value. All expressions return this single value, therefore it has a data type The data type is determined by the types of the expression's terms There are 3 types of Java statements: 1. Expression statements: assignments, pre/post increment/decrement, method calls, and object instantiation expressions, which are turned into statements by terminating them with a semi-colon

8 2. Declaration statements: tell Java the name of a storage location and the type of data that will be stored there. 3. Control flow statements: employ decision-making and looping to conditionally execute particular blocks of code. Statement block: 0 or more statements that are Terminated with semi-colons Enclosed in braces { } Syntactically, statement blocks can appear anywhere a single statement can appear Statement blocks can be nested inside other statement blocks SCOPE Scope: the scope of a variable is all the code that can access it There are 3 levels of variable scope: 1. Class level: a. Variables declared in a class, but outside of any methods b. The scope is the entire class, including the methods. 2. Method level (local scope): a. Variables declared inside a method b. The scope is from the variable's declaration statement until the closing brace of the method, including any nested statement blocks. 3. Block level (block scope): a. Variables declared in a block b. The scope is from the variable's declaration statement until the closing brace of the block, including any nested statement blocks. Control flow statements: use statement blocks extensively to delimit sequences of statements that should or should not be executed (decisions / if statements), or should be repeatedly executed (loops / for / while) Usually, statements are executed from top to bottom However, control flow statements break up the flow of execution by employing, eg. decisionmaking and looping, Allows your program to conditionally execute particular blocks of code. Lifetime: the time a variable exists in memory It is possible for variables to be alive, but temporarily out of scope Scope is a static concept, but lifetime is a dynamic concept.

### Chapter 3: Operators, Expressions and Type Conversion

101 Chapter 3 Operators, Expressions and Type Conversion Chapter 3: Operators, Expressions and Type Conversion Objectives To use basic arithmetic operators. To use increment and decrement operators. To

CS313D: ADVANCED PROGRAMMING LANGUAGE Computer Science department Lecture 2 : C# Language Basics Lecture Contents 2 The C# language First program Variables and constants Input/output Expressions and casting

### Unit 3. Operators. School of Science and Technology INTRODUCTION

INTRODUCTION Operators Unit 3 In the previous units (unit 1 and 2) you have learned about the basics of computer programming, different data types, constants, keywords and basic structure of a C program.

### Declaration and Memory

Declaration and Memory With the declaration int width; the compiler will set aside a 4-byte (32-bit) block of memory (see right) The compiler has a symbol table, which will have an entry such as Identifier

### 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.

### A variable is a name for a location in memory A variable must be declared

Variables A variable is a name for a location in memory A variable must be declared, specifying the variable's name and the type of information that will be held in it data type variable name int total;

### A complex expression to evaluate we need to reduce it to a series of simple expressions. E.g * 7 =>2+ 35 => 37. E.g.

1.3a Expressions Expressions An Expression is a sequence of operands and operators that reduces to a single value. An operator is a syntactical token that requires an action be taken An operand is an object

### Data and Variables. Data Types Expressions. String Concatenation Variables Declaration Assignment Shorthand operators. Operators Precedence

Data and Variables Data Types Expressions Operators Precedence String Concatenation Variables Declaration Assignment Shorthand operators Review class All code in a java file is written in a class public

### 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

### CSCI 2010 Principles of Computer Science. Data and Expressions 08/09/2013 CSCI

CSCI 2010 Principles of Computer Science Data and Expressions 08/09/2013 CSCI 2010 1 Data Types, Variables and Expressions in Java We look at the primitive data types, strings and expressions that are

### Java Primer 1: Types, Classes and Operators

Java Primer 1 3/18/14 Presentation for use with the textbook Data Structures and Algorithms in Java, 6th edition, by M. T. Goodrich, R. Tamassia, and M. H. Goldwasser, Wiley, 2014 Java Primer 1: Types,

### Chapter 12 Variables and Operators

Chapter 12 Variables and Operators Highlights (1) r. height width operator area = 3.14 * r *r + width * height literal/constant variable expression (assignment) statement 12-2 Highlights (2) r. height

### Module 2 - Part 2 DATA TYPES AND EXPRESSIONS 1/15/19 CSE 1321 MODULE 2 1

Module 2 - Part 2 DATA TYPES AND EXPRESSIONS 1/15/19 CSE 1321 MODULE 2 1 Topics 1. Expressions 2. Operator precedence 3. Shorthand operators 4. Data/Type Conversion 1/15/19 CSE 1321 MODULE 2 2 Expressions

ARITHMETIC OPERATORS if AND if/else AND while LOOP Order of Operation (Precedence Part 1) Copyright 2014 Dan McElroy Add Subtract Multiply Divide + Add - Subtract * Multiply / Divide = gives the quotient

### 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

### 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

### Chapter 2: Using Data

Chapter 2: Using Data TRUE/FALSE 1. A variable can hold more than one value at a time. F PTS: 1 REF: 52 2. The legal integer values are -2 31 through 2 31-1. These are the highest and lowest values that

### CMPT 125: Lecture 3 Data and Expressions

CMPT 125: Lecture 3 Data and Expressions Tamara Smyth, tamaras@cs.sfu.ca School of Computing Science, Simon Fraser University January 3, 2009 1 Character Strings A character string is an object in Java,

### CONTENTS: Compilation Data and Expressions COMP 202. More on Chapter 2

CONTENTS: Compilation Data and Expressions COMP 202 More on Chapter 2 Programming Language Levels There are many programming language levels: machine language assembly language high-level language Java,

### COMP Primitive and Class Types. Yi Hong May 14, 2015

COMP 110-001 Primitive and Class Types Yi Hong May 14, 2015 Review What are the two major parts of an object? What is the relationship between class and object? Design a simple class for Student How to

### Chapter 4: Basic C Operators

Chapter 4: Basic C Operators In this chapter, you will learn about: Arithmetic operators Unary operators Binary operators Assignment operators Equalities and relational operators Logical operators Conditional

### Data and Expressions. Outline. Data and Expressions 12/18/2010. Let's explore some other fundamental programming concepts. Chapter 2 focuses on:

Data and Expressions Data and Expressions Let's explore some other fundamental programming concepts Chapter 2 focuses on: Character Strings Primitive Data The Declaration And Use Of Variables Expressions

### 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

### Data Types and Variables in C language

Data Types and Variables in C language Disclaimer The slides are prepared from various sources. The purpose of the slides is for academic use only Operators in C C supports a rich set of operators. Operators

### Java enum, casts, and others (Select portions of Chapters 4 & 5)

Enum or enumerates types Java enum, casts, and others (Select portions of Chapters 4 & 5) Sharma Chakravarthy Information Technology Laboratory (IT Lab) Computer Science and Engineering Department The

### CGS 3066: Spring 2015 JavaScript Reference

CGS 3066: Spring 2015 JavaScript Reference Can also be used as a study guide. Only covers topics discussed in class. 1 Introduction JavaScript is a scripting language produced by Netscape for use within

### EXPRESSIONS AND ASSIGNMENT CITS1001

EXPRESSIONS AND ASSIGNMENT CITS1001 Scope of this lecture Assignment statements Expressions ASSIGNMENT STATEMENT Assignment Statements!!!mark = 50;!! Read as the value in variable on the LHS becomes equal

### Operators in C. Staff Incharge: S.Sasirekha

Operators in C Staff Incharge: S.Sasirekha Operators An operator is a symbol which helps the user to command the computer to do a certain mathematical or logical manipulations. Operators are used in C

### CIS 110: Introduction to Computer Programming

CIS 110: Introduction to Computer Programming Lecture 3 Express Yourself ( 2.1) 9/16/2011 CIS 110 (11fa) - University of Pennsylvania 1 Outline 1. Data representation and types 2. Expressions 9/16/2011

### GO - OPERATORS. This tutorial will explain the arithmetic, relational, logical, bitwise, assignment and other operators one by one.

http://www.tutorialspoint.com/go/go_operators.htm GO - OPERATORS Copyright tutorialspoint.com An operator is a symbol that tells the compiler to perform specific mathematical or logical manipulations.

### ECE 122 Engineering Problem Solving with Java

ECE 122 Engineering Problem Solving with Java Lecture 3 Expression Evaluation and Program Interaction Outline Problem: How do I input data and use it in complicated expressions Creating complicated expressions

### Operators. Java Primer Operators-1 Scott MacKenzie = 2. (b) (a)

Operators Representing and storing primitive data types is, of course, essential for any computer language. But, so, too, is the ability to perform operations on data. Java supports a comprehensive set

### IPCoreL. Phillip Duane Douglas, Jr. 11/3/2010

IPCoreL Programming Language Reference Manual Phillip Duane Douglas, Jr. 11/3/2010 The IPCoreL Programming Language Reference Manual provides concise information about the grammar, syntax, semantics, and

### Language Reference Manual

ALACS Language Reference Manual Manager: Gabriel Lopez (gal2129) Language Guru: Gabriel Kramer-Garcia (glk2110) System Architect: Candace Johnson (crj2121) Tester: Terence Jacobs (tj2316) Table of Contents

### Language Basics. /* The NUMBER GAME - User tries to guess a number between 1 and 10 */ /* Generate a random number between 1 and 10 */

Overview Language Basics This chapter describes the basic elements of Rexx. It discusses the simple components that make up the language. These include script structure, elements of the language, operators,

### Lexical Considerations

Massachusetts Institute of Technology Department of Electrical Engineering and Computer Science 6.035, Fall 2005 Handout 6 Decaf Language Wednesday, September 7 The project for the course is to write a

### Lexical Considerations

Massachusetts Institute of Technology Department of Electrical Engineering and Computer Science 6.035, Spring 2010 Handout Decaf Language Tuesday, Feb 2 The project for the course is to write a compiler

### Language Reference Manual simplicity

Language Reference Manual simplicity Course: COMS S4115 Professor: Dr. Stephen Edwards TA: Graham Gobieski Date: July 20, 2016 Group members Rui Gu rg2970 Adam Hadar anh2130 Zachary Moffitt znm2104 Suzanna

### 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

### Chapter 12 Variables and Operators

Chapter 12 Variables and Operators Basic C Elements Variables Named, typed data items Operators Predefined actions performed on data items Combined with variables to form expressions, statements Statements

### Petros: A Multi-purpose Text File Manipulation Language

Petros: A Multi-purpose Text File Manipulation Language Language Reference Manual Joseph Sherrick js2778@columbia.edu June 20, 2008 Table of Contents 1 Introduction...................................................

### 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

### The Arithmetic Operators. Unary Operators. Relational Operators. Examples of use of ++ and

The Arithmetic Operators The arithmetic operators refer to the standard mathematical operators: addition, subtraction, multiplication, division and modulus. Op. Use Description + x + y adds x and y x y

### Object oriented programming. Instructor: Masoud Asghari Web page: Ch: 3

Object oriented programming Instructor: Masoud Asghari Web page: http://www.masses.ir/lectures/oops2017sut Ch: 3 1 In this slide We follow: https://docs.oracle.com/javase/tutorial/index.html Trail: Learning

### The Arithmetic Operators

The Arithmetic Operators The arithmetic operators refer to the standard mathematical operators: addition, subtraction, multiplication, division and modulus. Examples: Op. Use Description + x + y adds x

### Week 4 Lecture 1. Expressions and Functions

Lecture 1 Expressions and Functions Expressions A representation of a value Expressions have a type Expressions have a value Examples 1 + 2: type int; value 3 1.2 + 3: type float; value 4.2 2 More expression

### 9/5/2018. Overview. The C Programming Language. Transitioning to C from Python. Why C? Hello, world! Programming in C

Overview The C Programming Language (with material from Dr. Bin Ren, William & Mary Computer Science) Motivation Hello, world! Basic Data Types Variables Arithmetic Operators Relational Operators Assignments

### Review of the C Programming Language for Principles of Operating Systems

Review of the C Programming Language for Principles of Operating Systems Prof. James L. Frankel Harvard University Version of 7:26 PM 4-Sep-2018 Copyright 2018, 2016, 2015 James L. Frankel. All rights

### CSE 142 Su 04 Computer Programming 1 - Java. Objects

Objects Objects have state and behavior. State is maintained in instance variables which live as long as the object does. Behavior is implemented in methods, which can be called by other objects to request

### Types and Expressions. Chapter 3

Types and Expressions Chapter 3 Chapter Contents 3.1 Introductory Example: Einstein's Equation 3.2 Primitive Types and Reference Types 3.3 Numeric Types and Expressions 3.4 Assignment Expressions 3.5 Java's

### The C Programming Language. (with material from Dr. Bin Ren, William & Mary Computer Science)

The C Programming Language (with material from Dr. Bin Ren, William & Mary Computer Science) 1 Overview Motivation Hello, world! Basic Data Types Variables Arithmetic Operators Relational Operators Assignments

### Introduction. Following are the types of operators: Unary requires a single operand Binary requires two operands Ternary requires three operands

Introduction Operators are the symbols which operates on value or a variable. It tells the compiler to perform certain mathematical or logical manipulations. Can be of following categories: Unary requires

### Expressions and Casting. Data Manipulation. Simple Program 11/5/2013

Expressions and Casting C# Programming Rob Miles Data Manipulation We know that programs use data storage (variables) to hold values and statements to process the data The statements are obeyed in sequence

### Lecture 3 Operators MIT AITI

Lecture 3 Operators MIT AITI - 2004 What are Operators? Operators are special symbols used for mathematical functions assignment statements logical comparisons Examples: 3 + 5 // uses + operator 14 + 5

### Review Chapters 1 to 4. Instructor: Scott Kristjanson CMPT 125/125 SFU Burnaby, Fall 2013

Review Chapters 1 to 4 Instructor: Scott Kristjanson CMPT 125/125 SFU Burnaby, Fall 2013 Introduction to Java Chapters 1 and 2 The Java Language Section 1.1 Data & Expressions Sections 2.1 2.5 Instructor:

### Expressions and Casting

Expressions and Casting C# Programming Rob Miles Data Manipulation We know that programs use data storage (variables) to hold values and statements to process the data The statements are obeyed in sequence

### CS106X Handout 03 Autumn 2012 September 24 th, 2012 Getting Started

CS106X Handout 03 Autumn 2012 September 24 th, 2012 Getting Started Handout written by Julie Zelenski, Mehran Sahami, Robert Plummer, and Jerry Cain. After today s lecture, you should run home and read

### Operators and Expressions in C & C++ Mahesh Jangid Assistant Professor Manipal University, Jaipur

Operators and Expressions in C & C++ Mahesh Jangid Assistant Professor Manipal University, Jaipur Operators and Expressions 8/24/2012 Dept of CS&E 2 Arithmetic operators Relational operators Logical operators

### Programming with Java

Programming with Java Data Types & Input Statement Lecture 04 First stage Software Engineering Dep. Saman M. Omer 2017-2018 Objectives q By the end of this lecture you should be able to : ü Know rules

### SECTION II: LANGUAGE BASICS

Chapter 5 SECTION II: LANGUAGE BASICS Operators Chapter 04: Basic Fundamentals demonstrated declaring and initializing variables. This chapter depicts how to do something with them, using operators. Operators

### Variables and Operators 2/20/01 Lecture #

Variables and Operators 2/20/01 Lecture #6 16.070 Variables, their characteristics and their uses Operators, their characteristics and their uses Fesq, 2/20/01 1 16.070 Variables Variables enable you to

### DM550 / DM857 Introduction to Programming. Peter Schneider-Kamp

DM550 / DM857 Introduction to Programming Peter Schneider-Kamp petersk@imada.sdu.dk http://imada.sdu.dk/~petersk/dm550/ http://imada.sdu.dk/~petersk/dm857/ OBJECT-ORIENTED PROGRAMMING IN JAVA 2 Programming

### 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

### Reserved Words and Identifiers

1 Programming in C Reserved Words and Identifiers Reserved word Word that has a specific meaning in C Ex: int, return Identifier Word used to name and refer to a data element or object manipulated by the

### TED Language Reference Manual

1 TED Language Reference Manual Theodore Ahlfeld(twa2108), Konstantin Itskov(koi2104) Matthew Haigh(mlh2196), Gideon Mendels(gm2597) Preface 1. Lexical Elements 1.1 Identifiers 1.2 Keywords 1.3 Constants

### GridLang: Grid Based Game Development Language Language Reference Manual. Programming Language and Translators - Spring 2017 Prof.

GridLang: Grid Based Game Development Language Language Reference Manual Programming Language and Translators - Spring 2017 Prof. Stephen Edwards Akshay Nagpal Dhruv Shekhawat Parth Panchmatia Sagar Damani

### 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)

### Outline. Performing Computations. Outline (cont) Expressions in C. Some Expression Formats. Types for Operands

Performing Computations C provides operators that can be applied to calculate expressions: tax is 8.5% of the total sale expression: tax = 0.085 * totalsale Need to specify what operations are legal, how

### UNIT- 3 Introduction to C++

UNIT- 3 Introduction to C++ C++ Character Sets: Letters A-Z, a-z Digits 0-9 Special Symbols Space + - * / ^ \ ( ) [ ] =!= . \$, ; : %! &? _ # = @ White Spaces Blank spaces, horizontal tab, carriage

### 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

### Program Elements -- Introduction

Program Elements -- Introduction We can now examine the core elements of programming Chapter 3 focuses on: data types variable declaration and use operators and expressions decisions and loops input and

### COMP-202 Unit 2: Java Basics. CONTENTS: Using Expressions and Variables Types Strings Methods

COMP-202 Unit 2: Java Basics CONTENTS: Using Expressions and Variables Types Strings Methods Assignment 1 Assignment 1 posted on WebCt and course website. It is due May 18th st at 23:30 Worth 6% Part programming,

### Introduction to Programming Using Java (98-388)

Introduction to Programming Using Java (98-388) Understand Java fundamentals Describe the use of main in a Java application Signature of main, why it is static; how to consume an instance of your own class;

### Constants and Variables

DATA STORAGE Constants and Variables In many introductory courses you will come across characteristics or elements such as rates, outputs, income, etc., measured by numerical values. Some of these will

### egrapher Language Reference Manual

egrapher Language Reference Manual Long Long: ll3078@columbia.edu Xinli Jia: xj2191@columbia.edu Jiefu Ying: jy2799@columbia.edu Linnan Wang: lw2645@columbia.edu Darren Chen: dsc2155@columbia.edu 1. Introduction

### Chapter 3 Syntax, Errors, and Debugging. Fundamentals of Java

Chapter 3 Syntax, Errors, and Debugging Objectives Construct and use numeric and string literals. Name and use variables and constants. Create arithmetic expressions. Understand the precedence of different

### Objects and Types. COMS W1007 Introduction to Computer Science. Christopher Conway 29 May 2003

Objects and Types COMS W1007 Introduction to Computer Science Christopher Conway 29 May 2003 Java Programs A Java program contains at least one class definition. public class Hello { public static void

### A Java program contains at least one class definition.

Java Programs Identifiers Objects and Types COMS W1007 Introduction to Computer Science Christopher Conway 29 May 2003 A Java program contains at least one class definition. public class Hello { public

### LESSON 1. A C program is constructed as a sequence of characters. Among the characters that can be used in a program are:

LESSON 1 FUNDAMENTALS OF C The purpose of this lesson is to explain the fundamental elements of the C programming language. C like other languages has all alphabet and rules for putting together words

### FRAC: Language Reference Manual

FRAC: Language Reference Manual Justin Chiang jc4127 Kunal Kamath kak2211 Calvin Li ctl2124 Anne Zhang az2350 1. Introduction FRAC is a domain-specific programming language that enables the programmer

### Reviewing for the Midterm Covers chapters 1 to 5, 7 to 9. Instructor: Scott Kristjanson CMPT 125/125 SFU Burnaby, Fall 2013

Reviewing for the Midterm Covers chapters 1 to 5, 7 to 9 Instructor: Scott Kristjanson CMPT 125/125 SFU Burnaby, Fall 2013 2 Things to Review Review the Class Slides: Key Things to Take Away Do you understand

### CSE 1001 Fundamentals of Software Development 1. Identifiers, Variables, and Data Types Dr. H. Crawford Fall 2018

CSE 1001 Fundamentals of Software Development 1 Identifiers, Variables, and Data Types Dr. H. Crawford Fall 2018 Identifiers, Variables and Data Types Reserved Words Identifiers in C Variables and Values

### Angela Z: A Language that facilitate the Matrix wise operations Language Reference Manual

Angela Z: A Language that facilitate the Matrix wise operations Language Reference Manual Contents Fei Liu, Mengdi Zhang, Taikun Liu, Jiayi Yan 1. Language definition 3 1.1. Usage 3 1.2. What special feature

### QUIZ: What value is stored in a after this

QUIZ: What value is stored in a after this statement is executed? Why? a = 23/7; QUIZ evaluates to 16. Lesson 4 Statements, Expressions, Operators Statement = complete instruction that directs the computer

### Slide 1 CS 170 Java Programming 1 Expressions Duration: 00:00:41 Advance mode: Auto

CS 170 Java Programming 1 Expressions Slide 1 CS 170 Java Programming 1 Expressions Duration: 00:00:41 What is an expression? Expression Vocabulary Any combination of operators and operands which, when

### Primitive Types. Four integer types: Two floating-point types: One character type: One boolean type: byte short int (most common) long

Primitive Types Four integer types: byte short int (most common) long Two floating-point types: float double (most common) One character type: char One boolean type: boolean 1 2 Primitive Types, cont.

### Department of Computer Science

Department of Computer Science Definition An operator is a symbol (+,-,*,/) that directs the computer to perform certain mathematical or logical manipulations and is usually used to manipulate data and

### Ordinary Differential Equation Solver Language (ODESL) Reference Manual

Ordinary Differential Equation Solver Language (ODESL) Reference Manual Rui Chen 11/03/2010 1. Introduction ODESL is a computer language specifically designed to solve ordinary differential equations (ODE

### More Programming Constructs -- Introduction

More Programming Constructs -- Introduction We can now examine some additional programming concepts and constructs Chapter 5 focuses on: internal data representation conversions between one data type and

### Pace University. Fundamental Concepts of CS121 1

Pace University Fundamental Concepts of CS121 1 Dr. Lixin Tao http://csis.pace.edu/~lixin Computer Science Department Pace University October 12, 2005 This document complements my tutorial Introduction

### corgi Language Reference Manual COMS W4115

corgi Language Reference Manual COMS W4115 Philippe Guillaume Losembe (pvl2109) Alisha Sindhwani (as4312) Melissa O Sullivan (mko2110) Justin Zhao (jxz2101) October 27, 2014 Chapter 1: Introduction corgi

### Fundamental of Programming (C)

Borrowed from lecturer notes by Omid Jafarinezhad Fundamental of Programming (C) Lecturer: Vahid Khodabakhshi Lecture 3 Constants, Variables, Data Types, And Operations Department of Computer Engineering

### Operators and Expressions

Operators and Expressions Conversions. Widening and Narrowing Primitive Conversions Widening and Narrowing Reference Conversions Conversions up the type hierarchy are called widening reference conversions

### Learning Language. Reference Manual. George Liao (gkl2104) Joseanibal Colon Ramos (jc2373) Stephen Robinson (sar2120) Huabiao Xu(hx2104)

Learning Language Reference Manual 1 George Liao (gkl2104) Joseanibal Colon Ramos (jc2373) Stephen Robinson (sar2120) Huabiao Xu(hx2104) A. Introduction Learning Language is a programming language designed

### Variables and literals

Demo lecture slides Although I will not usually give slides for demo lectures, the first two demo lectures involve practice with things which you should really know from G51PRG Since I covered much of

### Object-Oriented Programming

Object-Oriented Programming Java Syntax Program Structure Variables and basic data types. Industry standard naming conventions. Java syntax and coding conventions If Then Else Case statements Looping (for,

### COMP-202: Foundations of Programming. Lecture 3: Boolean, Mathematical Expressions, and Flow Control Sandeep Manjanna, Summer 2015

COMP-202: Foundations of Programming Lecture 3: Boolean, Mathematical Expressions, and Flow Control Sandeep Manjanna, Summer 2015 Announcements Slides will be posted before the class. There might be few

### Introduction to Visual Basic and Visual C++ Arithmetic Expression. Arithmetic Expression. Using Arithmetic Expression. Lesson 4.

Introduction to Visual Basic and Visual C++ Arithmetic Expression Lesson 4 Calculation I154-1-A A @ Peter Lo 2010 1 I154-1-A A @ Peter Lo 2010 2 Arithmetic Expression Using Arithmetic Expression Calculations