CIS133J. Working with Numbers in Java


 Pauline Horn
 4 years ago
 Views:
Transcription
1 CIS133J Working with Numbers in Java Contents: Using variables with integral numbers Using variables with floating point numbers How to declare integral variables How to declare floating point variables Saving and retrieving values using the variables Doing calculations Common calculations Trigonometric functions Numbers in Java fall into two categories: integral floating point Integral numbers are those that do not have a decimal point. They can hold whole number values only such as 100, 250, 4567 Floating point number have a decimal point and can hold fractional numbers such as 44.55, , Note that either type can store positive or negative numbers. Using variables with integral numbers The choice of variable types here are: byte short int long The only difference is the size of the variable. Normally, use int or long.
2 Using variables with floating point numbers The choice of variable type here are: float double The difference between these is the size of the variable and the precision. How to declare integral variables I will only show how to use int and long. To declare an int variable, use the int keyword and choose a name for the variable: int age; To declare a long variable, use the long keyword and choose a variable name: long distancetoplanet; How to declare floating point variables To declare a float variable, use the float keyword and name the variable. float taxrate; To declare a double variable, use the double keyword and name the variable: double budget; Saving and retrieving values using the variables To store a value into one of the variables, use an assignment statement: age = 45; budget = ; Numeric values that you use in your code, such as 45 above are called literals. A literal is a constant value.
3 A literal with a decimal point is assumed to be a double. For instance: float taxrate; taxrate = 55.66; will cause a compiler error because is assumed to be a double and taxrate was declared as a float. To fix this problem, use the f suffix after any literal you want to be treated as a float. taxrate = 55.66f; Now is considered a float and Java is happy. Warning! If you declare a variable of one type and try to store data of a different type in it, you will get a type mismatch error. Doing calculations Performing calculations is straightforward as long as all the numbers are of the same type. For example, double budget; double adjustment; double totalbudget; budget = ; adjustment = ; totalbudget = budget + adjustment; Every variable and literal is the same type. There is trouble when you try to mix types in a calculation. For example, double budget; double adjustment; int totalbudget; budget = ; adjustment = ; totalbudget = budget + adjustment;
4 Java doesn t like this because you are attempting to store budget + adjustment which is a double, into an int variable. These are called mixed calculations. Warning! If you try to store data of the wrong type into a variable, you will get a type mismatch error. The solution? The easiest is solution is: don t mix your types. Java will perform implicit casting in a mixed calculation. Here are the rules, performed in this order: 1. if either value is double, the other is converted to double 2. if either value is float, the other is converted to float 3. if either is long, the other is converted to long For example; public static void main(string[] args) double budget; float adjustment; double totalbudget; } budget = ; adjustment = f; totalbudget = budget + adjustment; Since budget is a double, and adjustment is a float, rule 2 applies and adjustment will be promoted to a double, in this calculation only. You can also force java to change the type of a variable using explicit casting, but that is dangerous if you don t know all the implications. We won t discuss that here. (Better to leave a rattlesnake alone.) I ll repeat: The easiest is solution is: don t mix your types. Common calculations Most of these are obvious and need no explanation. Addition
5 int x = 5; int y = 7; int total; total = x + y; Subtraction int x = 5; int y = 7; int result; result = x  y; Multiplication int x = 5; int y = 7; int result; result = x * y; Division int x = 5; int y = 7; int result; result = x / y; By the way, * and / are done before + and  in a calculation. For example, x + y * z y * z is done first, then add x to that result You can use ( ) to override this order, as in: (x + y) * z Now, x is added to y first, then the multiplication is performed. Use parentheses where needed to do the calculation correctly. Modulus Division (Integer Division) We all know that 12/2 = 6 with no remainder while 12/5 = 2 with a remainder of 2 The modulus operator (%) does a division and gives the remainder as a whole number. For example;
6 int x = 14; int y = 5; int result; result = x % y; result will contain 4 (because 14 % 5 = 2 with a remainder of 4) Two ways to add or subtract 1 from a variable You can do it the standard way: x = x + 1; or use the increment operator (++) x++; The same for the decrement () operator: or x = x  1; x; Find the maximum of two numbers You can do it with an if statement: int x = 6; int y = 8; if (x < y) or use the max method in the Math class: public static void main(string[] args) double budget = 44.55; double adjustment = ; } double result = Math.max(budget, adjustment); System.out.println (result); Find the minimum of two numbers Use the min method in the Math class public static void main(string[] args) double budget = 44.55; double adjustment = ;
7 } double result = Math.min(budget, adjustment); System.out.println (result); Alternatively, you could use a simple if statement. How to round a number Use the round method in the Math class public static void main(string[ ] args) double value = 66.53; } double roundedvalue = Math.round(value); System.out.println (roundedvalue); How to find the square root of a number Use the sqrt method in the Math class public static void main(string[] args) double value = 66.53; } double x = Math.sqrt(value); System.out.println (x); How to square a number Just multiply it by itself int x = 5; int square = x * x; Trigonometric functions These are all in the Math class. They aren t discussed here. Self test questions 1. What is a literal? Give an example. 2. What is the decrement operator? 3. Which is done first, addition or multiplication? 4. Java treats a literal such as as which data type?
8 5. Is it safe to use explicit casting? 6. How could you round a number?
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
More informationData 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
More informationBASIC 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 informationOn a 64bit CPU. Size/Range vary by CPU model and Word size.
On a 64bit CPU. Size/Range vary by CPU model and Word size. unsigned short x; //range 0 to 65553 signed short x; //range ± 32767 short x; //assumed signed There are (usually) no unsigned floats or doubles.
More informationPRIMITIVE VARIABLES. CS302 Introduction to Programming University of Wisconsin Madison Lecture 3. By Matthew Bernstein
PRIMITIVE VARIABLES CS302 Introduction to Programming University of Wisconsin Madison Lecture 3 By Matthew Bernstein matthewb@cs.wisc.edu Variables A variable is a storage location in your computer Each
More informationIntroduction to Computer Science and ObjectOriented Programming
COMP 111 Introduction to Computer Science and ObjectOriented Programming Values Judgment Programs Manipulate Values Inputs them Stores them Calculates new values from existing ones Outputs them In Java
More information1.00 Lecture 4. Promotion
1.00 Lecture 4 Data Types, Operators Reading for next time: Big Java: sections 6.16.4 Promotion increasing capacity Data Type Allowed Promotions double None float double long float,double int long,float,double
More informationINDEX. A SIMPLE JAVA PROGRAM Class Declaration The Main Line. The Line Contains Three Keywords The Output Line
A SIMPLE JAVA PROGRAM Class Declaration The Main Line INDEX The Line Contains Three Keywords The Output Line COMMENTS Single Line Comment Multiline Comment Documentation Comment TYPE CASTING Implicit Type
More informationOperators. Lecture 3 COP 3014 Spring January 16, 2018
Operators Lecture 3 COP 3014 Spring 2018 January 16, 2018 Operators Special builtin symbols that have functionality, and work on operands operand an input to an operator Arity  how many operands an operator
More informationExpressions 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
More informationProgram Fundamentals
Program Fundamentals /* HelloWorld.java * The classic Hello, world! program */ class HelloWorld { public static void main (String[ ] args) { System.out.println( Hello, world! ); } } /* HelloWorld.java
More informationWeek 2: Console I/O and Operators Arithmetic Operators. Integer Division. Arithmetic Operators. Gaddis: Chapter 3 (2.14,3.16,3.910,5.
Week 2: Console I/O and Operators Gaddis: Chapter 3 (2.14,3.16,3.910,5.1) CS 1428 Fall 2014 Jill Seaman 1 2.14 Arithmetic Operators An operator is a symbol that tells the computer to perform specific
More informationZhengLiang Lu Java Programming 45 / 79
1 class Lecture2 { 2 3 "Elementray Programming" 4 5 } 6 7 / References 8 [1] Ch. 2 in YDL 9 [2] Ch. 2 and 3 in Sharan 10 [3] Ch. 2 in HS 11 / ZhengLiang Lu Java Programming 45 / 79 Example Given a radius
More informationOutline. 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
More informationLECTURE 3 C++ Basics Part 2
LECTURE 3 C++ Basics Part 2 OVERVIEW Operators Type Conversions OPERATORS Operators are special builtin symbols that have functionality, and work on operands. Operators are actually functions that use
More informationJAVA Programming Fundamentals
Chapter 4 JAVA Programming Fundamentals By: Deepak Bhinde PGT Comp.Sc. JAVA character set Character set is a set of valid characters that a language can recognize. It may be any letter, digit or any symbol
More informationObjectOriented Programming
ObjectOriented 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,
More informationChapter 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
More informationBasics 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 informationExpressions 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
More informationCMPT 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,
More informationJAVA OPERATORS GENERAL
JAVA OPERATORS GENERAL Java provides a rich set of operators to manipulate variables. We can divide all the Java operators into the following groups: Arithmetic Operators Relational Operators Bitwise Operators
More informationCHAPTER 3 Expressions, Functions, Output
CHAPTER 3 Expressions, Functions, Output More Data Types: Integral Number Types short, long, int (all represent integer values with no fractional part). Computer Representation of integer numbers  Number
More informationCOSC 243. Data Representation 3. Lecture 3  Data Representation 3 1. COSC 243 (Computer Architecture)
COSC 243 Data Representation 3 Lecture 3  Data Representation 3 1 Data Representation Test Material Lectures 1, 2, and 3 Tutorials 1b, 2a, and 2b During Tutorial a Next Week 12 th and 13 th March If you
More informationDATA TYPES AND EXPRESSIONS
DATA TYPES AND EXPRESSIONS Outline Variables Naming Conventions Data Types Primitive Data Types Review: int, double New: boolean, char The String Class Type Conversion Expressions Assignment Mathematical
More informationGetting started with Java
Getting started with Java Magic Lines public class MagicLines { public static void main(string[] args) { } } Comments Comments are lines in your code that get ignored during execution. Good for leaving
More informationMODULE 02: BASIC COMPUTATION IN JAVA
MODULE 02: BASIC COMPUTATION IN JAVA Outline Variables Naming Conventions Data Types Primitive Data Types Review: int, double New: boolean, char The String Class Type Conversion Expressions Assignment
More informationInformation 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 Mixedtype
More information3. Java  Language Constructs I
Educational Objectives 3. Java  Language Constructs I Names and Identifiers, Variables, Assignments, Constants, Datatypes, Operations, Evaluation of Expressions, Type Conversions You know the basic blocks
More informationLesson 5: Introduction to the Java Basics: Java Arithmetic THEORY. Arithmetic Operators
Lesson 5: Introduction to the Java Basics: Java Arithmetic THEORY Arithmetic Operators There are four basic arithmetic operations: OPERATOR USE DESCRIPTION + op1 + op2 Adds op1 and op2  op1 + op2 Subtracts
More informationDeclaration and Memory
Declaration and Memory With the declaration int width; the compiler will set aside a 4byte (32bit) block of memory (see right) The compiler has a symbol table, which will have an entry such as Identifier
More informationCOMP 110 Introduction to Programming. What did we discuss?
COMP 110 Introduction to Programming Fall 2015 Time: TR 9:30 10:45 Room: AR 121 (Hanes Art Center) Jay Aikat FB 314, aikat@cs.unc.edu Previous Class What did we discuss? COMP 110 Fall 2015 2 1 Today Announcements
More informationIntroduction to Computer Science Unit 2. Notes
Introduction to Computer Science Unit 2. Notes Name: Objectives: By the completion of this packet, students should be able to describe the difference between.java and.class files and the JVM. create and
More informationBasic Operations jgrasp debugger Writing Programs & Checkstyle
Basic Operations jgrasp debugger Writing Programs & Checkstyle Suppose you wanted to write a computer game to play "Rock, Paper, Scissors". How many combinations are there? Is there a tricky way to represent
More informationLesson #3. Variables, Operators, and Expressions. 3. Variables, Operators and Expressions  Copyright Denis Hamelin  Ryerson University
Lesson #3 Variables, Operators, and Expressions Variables We already know the three main types of variables in C: int, char, and double. There is also the float type which is similar to double with only
More informationObjects 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
More informationA 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
More informationChapter 2. Elementary Programming
Chapter 2 Elementary Programming 1 Objectives To write Java programs to perform simple calculations To obtain input from the console using the Scanner class To use identifiers to name variables, constants,
More informationSolving Equations with Inverse Operations
Solving Equations with Inverse Operations Math 97 Supplement LEARNING OBJECTIVES 1. Solve equations by using inverse operations, including squares, square roots, cubes, and cube roots. The Definition of
More informationKey Concept: all programs can be broken down to a combination of one of the six instructions Assignment Statements can create variables to represent
Programming 2 Key Concept: all programs can be broken down to a combination of one of the six instructions Assignment Statements can create variables to represent information Input can receive information
More informationCS113: Lecture 3. Topics: Variables. Data types. Arithmetic and Bitwise Operators. Order of Evaluation
CS113: Lecture 3 Topics: Variables Data types Arithmetic and Bitwise Operators Order of Evaluation 1 Variables Names of variables: Composed of letters, digits, and the underscore ( ) character. (NO spaces;
More informationLecture Set 4: More About Methods and More About Operators
Lecture Set 4: More About Methods and More About Operators Methods Definitions Invocations More arithmetic operators Operator Side effects Operator Precedence Shortcircuiting main method public static
More informationExpressions 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 informationMr. Monroe s Guide to Mastering Java Syntax
Mr. Monroe s Guide to Mastering Java Syntax Getting Started with Java 1. Download and install the official JDK (Java Development Kit). 2. Download an IDE (Integrated Development Environment), like BlueJ.
More informationReview: Exam 1. Your First C++ Program. Declaration Statements. Tells the compiler. Examples of declaration statements
Review: Exam 1 9/20/06 CS150 Introduction to Computer Science 1 1 Your First C++ Program 1 //*********************************************************** 2 // File name: hello.cpp 3 // Author: Shereen Khoja
More informationTwo Types of Types. Primitive Types in Java. Using Primitive Variables. Class #07: Java Primitives. Integer types.
Class #07: Java Primitives Software Design I (CS 120): M. Allen, 13 Sep. 2018 Two Types of Types So far, we have mainly been dealing with objects, like DrawingGizmo, Window, Triangle, that are: 1. Specified
More informationLecture Set 4: More About Methods and More About Operators
Lecture Set 4: More About Methods and More About Operators Methods Definitions Invocations More arithmetic operators Operator Side effects Operator Precedence Shortcircuiting main method public static
More informationCEN 414 Java Programming
CEN 414 Java Programming Instructor: H. Esin ÜNAL SPRING 2017 Slides are modified from original slides of Y. Daniel Liang WEEK 2 ELEMENTARY PROGRAMMING 2 Computing the Area of a Circle public class ComputeArea
More informationMore 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
More informationAdd Subtract Multiply Divide
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
More informationOperators. Java Primer Operators1 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
More informationJava Foundations: Introduction to Program Design & Data Structures, 4e John Lewis, Peter DePasquale, Joseph Chase Test Bank: Chapter 2
Java Foundations Introduction to Program Design and Data Structures 4th Edition Lewis TEST BANK Full download at : https://testbankreal.com/download/javafoundationsintroductiontoprogramdesignanddatastructures4theditionlewistestbank/
More informationECE 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
More informationPrimitive Data, Variables, and Expressions; Simple Conditional Execution
Unit 2, Part 1 Primitive Data, Variables, and Expressions; Simple Conditional Execution Computer Science S111 Harvard University David G. Sullivan, Ph.D. Overview of the Programming Process Analysis/Specification
More informationJava provides a rich set of operators to manipulate variables. We can divide all the Java operators into the following groups:
Basic Operators Java provides a rich set of operators to manipulate variables. We can divide all the Java operators into the following groups: Arithmetic Operators Relational Operators Bitwise Operators
More informationCS5000: Foundations of Programming. Mingon Kang, PhD Computer Science, Kennesaw State University
CS5000: Foundations of Programming Mingon Kang, PhD Computer Science, Kennesaw State University Overview of Source Code Components Comments Library declaration Classes Functions Variables Comments Can
More informationTypes 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
More informationProgramming in C++ 5. Integral data types
Programming in C++ 5. Integral data types! Introduction! Type int! Integer multiplication & division! Increment & decrement operators! Associativity & precedence of operators! Some common operators! Long
More informationCS 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 information2/5/2018. Expressions are Used to Perform Calculations. ECE 220: Computer Systems & Programming. Our Class Focuses on Four Types of Operator in C
University of Illinois at UrbanaChampaign Dept. of Electrical and Computer Engineering ECE 220: Computer Systems & Programming Expressions and Operators in C (Partially a Review) Expressions are Used
More informationReserved 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
More informationChapter 2 Elementary Programming
Chapter 2 Elementary Programming Part I 1 Motivations In the preceding chapter, you learned how to create, compile, and run a Java program. Starting from this chapter, you will learn how to solve practical
More information1 class Lecture2 { 2 3 "Elementray Programming" / References 8 [1] Ch. 2 in YDL 9 [2] Ch. 2 and 3 in Sharan 10 [3] Ch.
1 class Lecture2 { 2 3 "Elementray Programming" 4 5 } 6 7 / References 8 [1] Ch. 2 in YDL 9 [2] Ch. 2 and 3 in Sharan 10 [3] Ch. 2 in HS 11 / ZhengLiang Lu Java Programming 41 / 68 Example Given the radius
More informationComputer Programming, I. Laboratory Manual. Experiment #2. Elementary Programming
Think Twice Code Once The Islamic University of Gaza Engineering Faculty Department of Computer Engineering Fall 2017 ECOM 2005 Khaleel I. Shaheen Computer Programming, I Laboratory Manual Experiment #2
More informationChapter 3 Structure of a C Program
Chapter 3 Structure of a C Program Objectives To be able to list and describe the six expression categories To understand the rules of precedence and associativity in evaluating expressions To understand
More informationFull file at
Java Programming: From Problem Analysis to Program Design, 3 rd Edition 21 Chapter 2 Basic Elements of Java At a Glance Instructor s Manual Table of Contents Overview Objectives s Quick Quizzes Class
More informationValues and Variables 1 / 30
Values and Variables 1 / 30 Values 2 / 30 Computing Computing is any purposeful activity that marries the representation of some dynamic domain with the representation of some dynamic machine that provides
More informationOverview (4) CPE 101 mod/reusing slides from a UW course. Assignment Statement: Review. Why Study Expressions? D1
CPE 101 mod/reusing slides from a UW course Overview (4) Lecture 4: Arithmetic Expressions Arithmetic expressions Integer and floatingpoint (double) types Unary and binary operators Precedence Associativity
More informationUNIT 3 Introduction to C++
UNIT 3 Introduction to C++ C++ Character Sets: Letters AZ, az Digits 09 Special Symbols Space +  * / ^ \ ( ) [ ] =!= . $, ; : %! &? _ # = @ White Spaces Blank spaces, horizontal tab, carriage
More informationChapter 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
More informationInformation 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 informationCOMP Primitive and Class Types. Yi Hong May 14, 2015
COMP 110001 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
More informationNumerical Data. CS 180 Sunil Prabhakar Department of Computer Science Purdue University
Numerical Data CS 180 Sunil Prabhakar Department of Computer Science Purdue University Problem Write a program to compute the area and perimeter of a circle given its radius. Requires that we perform operations
More informationcis20.1 design and implementation of software applications I fall 2007 lecture # I.2 topics: introduction to java, part 1
topics: introduction to java, part 1 cis20.1 design and implementation of software applications I fall 2007 lecture # I.2 cis20.1fall2007sklarleci.2 1 Java. Java is an objectoriented language: it is
More informationJava Fall 2018 Margaret ReidMiller
Java 15121 Fall 2018 Margaret ReidMiller Reminders How many late days can you use all semester? 3 How many late days can you use for a single assignment? 1 What is the penalty for turning an assignment
More informationSSEA Computer Science: Track A. Dr. Cynthia Lee Lecturer in Computer Science Stanford
SSEA Computer Science: Track A Dr. Cynthia Lee Lecturer in Computer Science Stanford Topics for today Introduce Java programming language Assignment and type casting Expressions Operator precedence Code
More informationOperators 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
More informationOperators. 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 informationVisual C# Instructor s Manual Table of Contents
Visual C# 2005 21 Chapter 2 Using Data At a Glance Instructor s Manual Table of Contents Overview Objectives s Quick Quizzes Class Discussion Topics Additional Projects Additional Resources Key Terms
More informationChapter 3. Numeric Types, Expressions, and Output
Chapter 3 Numeric Types, Expressions, and Output 1 Chapter 3 Topics Constants of Type int and float Evaluating Arithmetic Expressions Implicit Type Coercion and Explicit Type Conversion Calling a ValueReturning
More informationComputer System and programming in C
1 Basic Data Types Integral Types Integers are stored in various sizes. They can be signed or unsigned. Example Suppose an integer is represented by a byte (8 bits). Leftmost bit is sign bit. If the sign
More informationAnnouncements. Lab Friday, 12:30 and 34:30 in Boot your laptop and start Forte, if you brought your laptop
Announcements Lab Friday, 12:30 and 34:30 in 26152 Boot your laptop and start Forte, if you brought your laptop Create an empty file called Lecture4 and create an empty main() method in a class: 1.00
More informationChapter 2: Data and Expressions
Chapter 2: Data and Expressions CS 121 Department of Computer Science College of Engineering Boise State University August 21, 2017 Chapter 2: Data and Expressions CS 121 1 / 51 Chapter 1 Terminology Review
More informationThese are reserved words of the C language. For example int, float, if, else, for, while etc.
Tokens in C Keywords These are reserved words of the C language. For example int, float, if, else, for, while etc. Identifiers An Identifier is a sequence of letters and digits, but must start with a letter.
More informationCS110: PROGRAMMING LANGUAGE I
CS110: PROGRAMMING LANGUAGE I Computer Science Department Lecture 4: Java Basics (II) A java Program 12 Class in file.java class keyword braces {, } delimit a class body main Method // indicates a comment.
More informationJava 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 informationAP Computer Science Unit 1. Programs
AP Computer Science Unit 1. Programs Open DrJava. Under the File menu click on New Java Class and the window to the right should appear. Fill in the information as shown and click OK. This code is generated
More informationCOMP202 Unit 2: Java Basics. CONTENTS: Using Expressions and Variables Types Strings Methods
COMP202 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,
More informationChapter 2: Using Data
Chapter 2: Using Data Declaring Variables Constant Cannot be changed after a program is compiled Variable A named location in computer memory that can hold different values at different points in time
More informationCSCI 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
More informationENGINEERING 1020 Introduction to Computer Programming M A Y 2 6, R E Z A S H A H I D I
ENGINEERING 1020 Introduction to Computer Programming M A Y 2 6, 2 0 1 0 R E Z A S H A H I D I Today s class Constants Assignment statement Parameters and calling functions Expressions Mixed precision
More informationEx: If you use a program to record sales, you will want to remember data:
Data Variables Programs need to remember values. Ex: If you use a program to record sales, you will want to remember data: A loaf of bread was sold to Sione Latu on 14/02/19 for T$1.00. Customer Name:
More informationJava Classes: Math, Integer A C S L E C T U R E 8
Java Classes: Math, Integer A C S  1903 L E C T U R E 8 Math class Math class is a utility class You cannot create an instance of Math All references to constants and methods will use the prefix Math.
More informationLESSON 5 FUNDAMENTAL DATA TYPES. char short int long unsigned char unsigned short unsigned unsigned long
LESSON 5 ARITHMETIC DATA PROCESSING The arithmetic data types are the fundamental data types of the C language. They are called "arithmetic" because operations such as addition and multiplication can be
More informationTester vs. Controller. Elementary Programming. Learning Outcomes. Compile Time vs. Run Time
Tester vs. Controller Elementary Programming EECS1022: Programming for Mobile Computing Winter 2018 CHENWEI WANG For effective illustrations, code examples will mostly be written in the form of a tester
More informationExpressions 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 informationVARIABLES AND TYPES CITS1001
VARIABLES AND TYPES CITS1001 Scope of this lecture Types in Java the eight primitive types the unlimited number of object types Values and References The Golden Rule Primitive types Every piece of data
More informationElementary Programming
Elementary Programming EECS1022: Programming for Mobile Computing Winter 2018 CHENWEI WANG Learning Outcomes Learn ingredients of elementary programming: data types [numbers, characters, strings] literal
More informationCS 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 informationChapter 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 2 311. These are the highest and lowest values that
More information