# Primitive Data Types: Intro

Size: px
Start display at page:

Transcription

1 Primitive Data Types: Intro Primitive data types represent single values and are built into a language Java primitive numeric data types: 1. Integral types (a) byte (b) int (c) short (d) long 2. Real types (a) float (b) double 3. Boolean type 4. Char type What distinguishes the various data types of a given group is the amount of memory allocated for storage The greater the amount of storage, the greater the range of values that can be represented 1

2 Represent whole numbers: 2, 103, -47 Stored as binary whole numbers Primitive Data Types: Integers represents = = 213 Binary only uses digits 0 and represents = = 213 Java allocates the following storage type bytes smallest largest byte short int long

3 Primitive Data Types: Floating Point Types Represent numbers with decimal points: 3.0, , -32.5, 0.11, 3.,.6 Stored in scientific notation represented as = represented as = Java allocates the following storage type bytes smallest largest float double

4 Primitive Data Types: Variable Declarations A declaration is a statement which associates a memory location with a variable Primitive declaration syntax: type var name; type var name = initial value; Generally, put one declaration per line Use memory diagrams to represent variables and their values Memory diagrams for primitive types look like variable name: value There is no value until the variable has been initialized 4

5 Assignment is most basic instruction Syntax: storage location= expression Primitive Data Types: Numeric Assignment Semantics: Value of expression stored in storage location Left side often referred to as the lvalue of the statement Right side often referred to as the rvalue of the statement Numeric expressions can take a number of forms: 1. Literal Literal is an actual value Integer syntax: one or more digits Float syntax: number with a decimal point with digits before, after, or both number(float or int) e ± integer Type suffix By default, floating point literals are interpreted as type double By default, integral literals are interpreted as type int To indicate a specific type, Java allows a suffix to be appended to a literal Suffix f F d D l L Meaning float double long Long 5

6 2. Variable Primitive Data Types: Numeric Assignment (2) The assignment copies the value of the variable on the right into the memory associated with the variable on the left 3. Named (symbolic) constant Value that cannot be changed during program execution Represented by an identifier, just like a variable MUST be initialized at declaration Syntax: final [modifiers] type id = constant expression; Convention: use all caps for identifier 4. Value-returning method calls The value produced by such a method will be stored in the variable java.lang.math provides a number of useful class methods for performing standard math function 6

7 Primitive Data Types: Numeric Assignment (3) Method** Function int abs(int) absolute value of x long abs(long) float abs(float) double abs(double) double acos(double) arccosine of x double asin(double) arcsin of x double atan(double) arctangent of x double ceil(double) smallest whole number x double cos(double) cosine of x double exp(double) e x double floor(double) largest whole number x double log(double) log e (x) int max(int, int) larger of x and y long max(long, long) float max(float, float) int min(int, int) smaller of x and y long min(long, long) float min(float, float) double pow(double, double) x y double random() 0.0 value < 1.0 int round(float) X rounded to the nearest whole number long round(double) double sin(double) sine of x double sqrt(double) x double tan(double) tangent of x double todegrees(double) x converted to degrees double toradians(double) x converted to radians ** NOTE: arguments assumed to be x and y (in that order) * NOTE: trig functions are based on radians Constants: Math.E Math.PI 7

8 5. Simple arithmetic expressions Primitive Data Types: Numeric Assignment (4) These involve a calculation involving an arithmetic operator Unary operators (1 operand): (a) + (b) - Binary operators (2 operands): (a) + (b) - (c) * (multiplication) (d) / (division: integer and real) (e) % (remainder: integer only) 6. Compound expressions Involve more than one operator Evaluation determined by associativity and precedence Associativity Pertains to the direction a given operator evaluates Can be left or right Precedence Pertains to order in which different operators are evaluated 8

9 Primitive Data Types: Numeric Assignment (5) Associativity and precedence chart (Wu, p 241): Operator Type Precedence Operators Associativity Subexpression 16 () Postfix increment L and decrement Prefix increment R and decrement Unary 14! R + - Type cast 13 (type) R Multiplicative 12 * L / % Additive 11 + L - + (string catenation) Relational 9 > L < <= >= Equality 8 == L!= Boolean AND 4 && L Boolean OR 3 L Boolean NOT 3! L conditional 2?: R Assignment 1 = R += (etc) Operator types listed from highest to lowest precedence. L indicates left-to-right; R indicates right-to-left. 9

10 Primitive Data Types: Numeric Assignment (6) 7. Increment and decrement operators Operators: (a) ++ (b) There are actually 4 of them 2 are postfix: (a) operand++ (b) operand 2 are prefix: (a) ++operand (b) operand Postfix semantics: (a) return value of operand (b) operand = operand ±1 Prefix semantics: (a) operand = operand ±1 (b) return value of operand 8. Special assignment operators These are shortcuts: (a) += (b) -= (c) *= (d) /= (e) %= They all work in the same way e.g., Each combines an arithmetic operation with assignment Semantics of variable op= value: variable = variable op value e.g., x = y; is equivalent to x = x y; 10

11 Primitive Data Types: Mixed-Mode Expressions and Data Conversions Operator overloading Expression uses integer addition Expression uses floating point addition There are actually several versions of the + operator This is called operator overloading How does Java handle ? Mixed-mode expressions involve 2 different data types In order to perform operation, the arguments must be made compatible so Java knows which version of + to use Such changes in type are called type conversions Java provides 2 approaches: implicit and explicit Implicit (coercion, promotion) Java performs the conversion automatically Argument of lesser precision is converted to the type of the argument with greater precision Unary operator algorithm: 1. If type byte or short, int 2. Else, do nothing Binary operator algorithm: 1. If either type is double, other double 2. Else if either type is float, other float 3. Else if either type is long, other long 4. Else, both int These called widening conversions, as no information is lost 11

12 Primitive Data Types: Mixed-Mode Expressions and Data Conversions (2) Assignment conversion Refers to situation when lvalue and rvalue of assignment statement are of different types Algorithm: 1. If lvalue of equal or greater precision, convert rvalue to data type of lvalue 2. Else, generate type-mismatch error Java will not implicitly perform a narrowing conversion Dangerous: will lose precision, fractions, or may cause run-time error Explicit (type casting) Programmer s code forces the conversion Achieved using a typecast operator Syntax: (type) expression e.g., x = (int)( ); Semantics: Evaluate expression and convert result to type May be either widening or narrowing conversion 12

13 Primitive Data Types: Assignment Cautions Assignment is an instruction, not an equality as in algebra x = x + 1 is valid assignment Operators are not assumed x = 5(y + 10) is not valid Be careful of Integer division int x, y; float z; x = 10; y = 4; z = x/y; Value of z is??? 13

14 Primitive Data Types: Boolean and Char Types 1. Boolean 2. Char Values: true and false Operators: Relational: >, <, <=, >=, ==,!= Logical: Boolean AND: && Boolean OR: Boolean NOT:! Values: Any character Delimited by single quotes Special characters: \b (backspace) \n (newline) \r (return) \t (tab) Characters that have special meaning (e.g., double quote, backslash) can be represented without their special meaning by preceding with a backslash (e.g. \ ) Characters can appear in arithmetic expressions Chars are represented as integers using ASCII (Unicode), a numerical code for representing characters When appearing in arithmetic expressions, the numeric representation is used e.g., In intx = A + 1; x gets the value 66 (ASCII value for A is 65) In charc = (char) A + 1; c gets the value B (because 66 is the ASCII value for B ) 14

15 Reference Types: Intro Reference types do not have a fixed amount of memory storage associated with them Therefore, the compiler cannot simply set aside memory for such a type like it can for primitive types Reference types are represented by a class Classes consist of two components: 1. Instance variables Represent properties of the class 2. Methods Represent actions of the class Method calls are the means by which a program communicates with objects of a class Method call syntax: object name.method name(parameter list) A variable represents a specific instance of the class: an object When a reference type is declared, memory is set aside for a reference to a potential object At this time, the variable has no value (null, often represented by φ)) A null pointer refers to the absence of a reference; i.e., a reference to nothing If you try to use a variable with a null pointer, you will get error messages The program must contain code to create a new object to assign to the variable Syntax: var name = new class name(parameters); class name(parameters) is a method call to a special method called a constuctor A constructor method sets aside memory for the newly created object (which includes memory for its instance variables) and returns a reference to it (pointer, memory address) A constructor has the same name as the class, and starts with a capital letter Once created, the reference to the object is stored in the variable 15

16 Reference Types: Intro (2) Note that two sets of memory are used with reference types: 1. Memory for the reference, associated with the variable 2. Memory for the object, which is referenced (pointed to) A class is a template/model/schematic for an object An object is an instance - a specific example - of a class Each object has its own set of instance variables with their own values A call of an object s methods affect only that object Built-in reference types: Strings and arrays 16

17 Reference Types: Strings A String object represents an arbitrary sequence of characters The text is delimited by double quotes (but is not part of the string) Unlike other reference types, String objects can be created by simple assignment: String name = John Doe ; They can also be created using the standard syntax (but rarely are): String name = new String( John Doe ); The empty string Represented by a pair of double quotes: Is a string with no characters The concatenation operator: + If either operand is a string, 1. Converts second operand into a string if it is not 2. Combines the operands into a single string John + Doe John Doe John + 32 John32 17

18 Basic String methods (see pp ): Reference Types: Strings (2) 18

19 Basic IO 1. Basic output Standard output (the display) is represented by class System.out (where out is an instance variable of class PrintStream) To output a value, use System.out.print(argument) method, which prints its argument on the current line System.out.println(argument), works same except adds an end-of-line character ( \n ) The text also discusses System.out.printf(), which is used to format output; we will ignore this Note that there is a print and println method for each data type Which gets called depends of the argument This is called overloading 2. Basic input Standard input (the keyborad) is represented by class System.in System.in is comparable to System.out, except for input To facilitate input, use a Scanner object Found in java.util To associate a Scanner object with System.in: (a) import java.util.*; //import the appropriate package (b) Scanner scanner; //declare a Scanner object (c) scanner = new Scanner(System.in); // create object and pass the stream to be linked (d) //Access input stream using Scanner methods next(), nextbyte(), nextshort(), nextint(), nextlong(), nextfloat(), or nextdouble(), e.g., int x = scanner.nextint(); double y = scanner.nextdouble(); If user enters an incompatible data type, an error (exception) occurs A program should supply a prompt - a message stating what kind of data is expected If user enters more data than is required, extra sits in buffer until more input is requested 19

### 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

### 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

### 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

### Chapter 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

### Chapter 2: Data and Expressions

Chapter 2: Data and Expressions CS 121 Department of Computer Science College of Engineering Boise State University January 15, 2015 Chapter 2: Data and Expressions CS 121 1 / 1 Chapter 2 Part 1: Data

### 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

### 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;

### DUBLIN CITY UNIVERSITY

DUBLIN CITY UNIVERSITY REPEAT EXAMINATIONS 2008 MODULE: Object-oriented Programming I - EE219 COURSE: B.Eng. in Electronic Engineering (Year 2 & 3) B.Eng. in Information Telecomms Engineering (Year 2 &

### DUBLIN CITY UNIVERSITY

DUBLIN CITY UNIVERSITY SEMESTER ONE EXAMINATIONS 2007 MODULE: Object Oriented Programming I - EE219 COURSE: B.Eng. in Electronic Engineering B.Eng. in Information Telecommunications Engineering B.Eng.

### 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,

### Full file at

Java Programming, Fifth Edition 2-1 Chapter 2 Using Data within a Program At a Glance Instructor s Manual Table of Contents Overview Objectives Teaching Tips Quick Quizzes Class Discussion Topics Additional

### Chapter 2: Data and Expressions

Chapter 2: Data and Expressions CS 121 Department of Computer Science College of Engineering Boise State University April 21, 2015 Chapter 2: Data and Expressions CS 121 1 / 53 Chapter 2 Part 1: Data Types

### 12. Numbers. Java. Summer 2008 Instructor: Dr. Masoud Yaghini

12. Numbers Java Summer 2008 Instructor: Dr. Masoud Yaghini Outline Numeric Type Conversions Math Class References Numeric Type Conversions Numeric Data Types (Review) Numeric Type Conversions Consider

### Chapter 2 Using Data. Instructor s Manual Table of Contents. At a Glance. Overview. Objectives. Teaching Tips. Quick Quizzes. Class Discussion Topics

Java Programming, Sixth Edition 2-1 Chapter 2 Using Data At a Glance Instructor s Manual Table of Contents Overview Objectives Teaching Tips Quick Quizzes Class Discussion Topics Additional Projects Additional

### static int min(int a, int b) Returns the smaller of two int values. static double pow(double a,

The (Outsource: Supplement) The includes a number of constants and methods you can use to perform common mathematical functions. A commonly used constant found in the Math class is Math.PI which is defined

### Expressions and operators

Mathematical operators and expressions The five basic binary mathematical operators are Operator Operation Example + Addition a = b + c - Subtraction a = b c * Multiplication a = b * c / Division a = b

Lecture Notes 1. Comments a. /* */ b. // 2. Program Structures a. public class ComputeArea { public static void main(string[ ] args) { // input radius // compute area algorithm // output area Actions to

### Chapter 2 Primitive Data Types and Operations. Objectives

Chapter 2 Primitive Data Types and Operations Prerequisites for Part I Basic computer skills such as using Windows, Internet Explorer, and Microsoft Word Chapter 1 Introduction to Computers, Programs,

### Chapter 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,

### Lecture Set 2: Starting Java

Lecture Set 2: Starting Java 1. Java Concepts 2. Java Programming Basics 3. User output 4. Variables and types 5. Expressions 6. User input 7. Uninitialized Variables 0 This Course: Intro to Procedural

### Chapter 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

### Lecture Set 2: Starting Java

Lecture Set 2: Starting Java 1. Java Concepts 2. Java Programming Basics 3. User output 4. Variables and types 5. Expressions 6. User input 7. Uninitialized Variables 0 This Course: Intro to Procedural

### Chapter 2 ELEMENTARY PROGRAMMING

Chapter 2 ELEMENTARY PROGRAMMING Lecture notes for computer programming 1 Faculty of Engineering and Information Technology Prepared by: Iyad Albayouk ١ Objectives To write Java programs to perform simple

### 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,

### Using Java Classes Fall 2018 Margaret Reid-Miller

Using Java Classes 15-121 Fall 2018 Margaret Reid-Miller Today Strings I/O (using Scanner) Loops, Conditionals, Scope Math Class (random) Fall 2018 15-121 (Reid-Miller) 2 The Math Class The Math class

### Chapter 2 Primitive Data Types and Operations

Chapter 2 Primitive Data Types and Operations 2.1 Introduction You will be introduced to Java primitive data types and related subjects, such as variables constants, data types, operators, and expressions.

### Chapter. Let's explore some other fundamental programming concepts

Data and Expressions 2 Chapter 5 TH EDITION Lewis & Loftus java Software Solutions Foundations of Program Design 2007 Pearson Addison-Wesley. All rights reserved Data and Expressions Let's explore some

### 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

### The Math Class (Outsource: Math Class Supplement) Random Numbers. Lab 06 Math Class

The (Outsource: Supplement) The includes a number of constants and methods you can use to perform common mathematical functions. A commonly used constant found in the Math class is Math.PI which is defined

### 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,

### 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

### 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

### 1st and 3rd September 2015

1st and 3rd September 2015 Agenda for the week 1 2 3 Math functions and corresponding libraries The standard library has the abs(int) function besides that, the cmath library has the following inbuilt

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

### CS110: PROGRAMMING LANGUAGE I

CS110: PROGRAMMING LANGUAGE I Computer Science Department Lecture 4: Java Basics (II) A java Program 1-2 Class in file.java class keyword braces {, } delimit a class body main Method // indicates a comment.

### 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:

### Objectives. Chapter 2: Basic Elements of C++ Introduction. Objectives (cont d.) A C++ Program (cont d.) A C++ Program

Objectives Chapter 2: Basic Elements of C++ In this chapter, you will: Become familiar with functions, special symbols, and identifiers in C++ Explore simple data types Discover how a program evaluates

### Chapter 2: Basic Elements of C++

Chapter 2: Basic Elements of C++ Objectives In this chapter, you will: Become familiar with functions, special symbols, and identifiers in C++ Explore simple data types Discover how a program evaluates

### 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

### 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

### Chapter 2: Basic Elements of C++ Objectives. Objectives (cont d.) A C++ Program. Introduction

Chapter 2: Basic Elements of C++ C++ Programming: From Problem Analysis to Program Design, Fifth Edition 1 Objectives In this chapter, you will: Become familiar with functions, special symbols, and identifiers

### C Programs: Simple Statements and Expressions

.. Cal Poly CPE 101: Fundamentals of Computer Science I Alexander Dekhtyar.. C Programs: Simple Statements and Expressions C Program Structure A C program that consists of only one function has the following

### 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

Assoc. Prof. Dr. Marenglen Biba (C) 2010 Pearson Education, Inc. All rights reserved. Java application A computer program that executes when you use the java command to launch the Java Virtual Machine

### C Language Part 1 Digital Computer Concept and Practice Copyright 2012 by Jaejin Lee

C Language Part 1 (Minor modifications by the instructor) References C for Python Programmers, by Carl Burch, 2011. http://www.toves.org/books/cpy/ The C Programming Language. 2nd ed., Kernighan, Brian,

### Data Conversion & Scanner Class

Data Conversion & Scanner Class Quick review of last lecture August 29, 2007 ComS 207: Programming I (in Java) Iowa State University, FALL 2007 Instructor: Alexander Stoytchev Numeric Primitive Data Storing

### Basic computer skills such as using Windows, Internet Explorer, and Microsoft Word. Chapter 1 Introduction to Computers, Programs, and Java

Basic computer skills such as using Windows, Internet Explorer, and Microsoft Word Chapter 1 Introduction to Computers, Programs, and Java Chapter 2 Primitive Data Types and Operations Chapter 3 Selection

### 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

### CS5000: Foundations of Programming. Mingon Kang, PhD Computer Science, Kennesaw State University

CS5000: Foundations of Programming Mingon Kang, PhD Computer Science, Kennesaw State University Mathematical Functions Java provides many useful methods in the Math class for performing common mathematical

### 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

Visual C# 2005 2-1 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

### 3. 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

### 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

### Exam 1 Prep. Dr. Demetrios Glinos University of Central Florida. COP3330 Object Oriented Programming

Exam 1 Prep Dr. Demetrios Glinos University of Central Florida COP3330 Object Oriented Programming Progress Exam 1 is a Timed Webcourses Quiz You can find it from the "Assignments" link on Webcourses choose

### 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;

### Mathematical Functions, Characters, and Strings. CSE 114, Computer Science 1 Stony Brook University

Mathematical Functions, Characters, and Strings CSE 114, Computer Science 1 Stony Brook University http://www.cs.stonybrook.edu/~cse114 1 Static methods Remember the main method header? public static void

### CS112 Lecture: Primitive Types, Operators, Strings

CS112 Lecture: Primitive Types, Operators, Strings Last revised 1/24/06 Objectives: 1. To explain the fundamental distinction between primitive types and reference types, and to introduce the Java primitive

### Chapter 4 Mathematical Functions, Characters, and Strings

Chapter 4 Mathematical Functions, Characters, and Strings Liang, Introduction to Java Programming, Tenth Edition, Global Edition. Pearson Education Limited 2015 1 Motivations Suppose you need to estimate

### Computational Expression

Computational Expression Variables, Primitive Data Types, Expressions Janyl Jumadinova 28-30 January, 2019 Janyl Jumadinova Computational Expression 28-30 January, 2019 1 / 17 Variables Variable is a name

### Programming in C++ 6. Floating point data types

Programming in C++ 6. Floating point data types! Introduction! Type double! Type float! Changing types! Type promotion & conversion! Casts! Initialization! Assignment operators! Summary 1 Introduction

### Values 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

### Lesson 02 Data Types and Statements. MIT 11053, Fundamentals of Programming By: S. Sabraz Nawaz Senior Lecturer in MIT Department of MIT FMC, SEUSL

Lesson 02 Data Types and Statements MIT 11053, Fundamentals of Programming By: S. Sabraz Nawaz Senior Lecturer in MIT Department of MIT FMC, SEUSL Topics Covered Statements Variables Data Types Arithmetic

### 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 02: Using Data

True / False 1. A variable can hold more than one value at a time. ANSWER: False REFERENCES: 54 2. The int data type is the most commonly used integer type. ANSWER: True REFERENCES: 64 3. Multiplication,

### JAVA 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

### 2: Basics of Java Programming

2: Basics of Java Programming CSC 1051 Algorithms and Data Structures I Dr. Mary-Angela Papalaskari Department of Computing Sciences Villanova University Course website: www.csc.villanova.edu/~map/1051/

### 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

### To define methods, invoke methods, and pass arguments to a method ( ). To develop reusable code that is modular, easy-toread, easy-to-debug,

1 To define methods, invoke methods, and pass arguments to a method ( 5.2-5.5). To develop reusable code that is modular, easy-toread, easy-to-debug, and easy-to-maintain. ( 5.6). To use method overloading

### CHAPTER 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

### 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

### 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

### 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

### Lecture 3. More About C

Copyright 1996 David R. Hanson Computer Science 126, Fall 1996 3-1 Lecture 3. More About C Programming languages have their lingo Programming language Types are categories of values int, float, char Constants

### Programmierpraktikum

Programmierpraktikum Claudius Gros, SS2012 Institut für theoretische Physik Goethe-University Frankfurt a.m. 1 of 22 10/25/2012 09:08 AM Java - Basic Data Types 2 of 22 10/25/2012 09:08 AM primitive data

### Chapter 5 Methods. Liang, Introduction to Java Programming, Eighth Edition, (c) 2011 Pearson Education, Inc. All rights reserved.

Chapter 5 Methods rights reserved. 0132130807 1 Opening Problem Find the sum of integers from 1 to 10, from 20 to 30, and from 35 to 45, respectively. rights reserved. 0132130807 2 1 Problem int sum =

### Chapter 6 Primitive types

Chapter 6 Primitive types Lesson page 6-1. Primitive types Question 1. There are an infinite number of integers, so it would be too ineffient to have a type integer that would contain all of them. Question

### Chapter 2 Elementary Programming. Liang, Introduction to Java Programming, Tenth Edition, (c) 2015 Pearson Education, Inc. All rights reserved.

Chapter 2 Elementary Programming 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 problems

### Computational Expression

Computational Expression Scanner, Increment/Decrement, Conversion Janyl Jumadinova 17 September, 2018 Janyl Jumadinova Computational Expression 17 September, 2018 1 / 11 Review: Scanner The Scanner class

### CS110: PROGRAMMING LANGUAGE I

CS110: PROGRAMMING LANGUAGE I Computer Science Department Lecture 8: Methods Lecture Contents: 2 Introduction Program modules in java Defining Methods Calling Methods Scope of local variables Passing Parameters

### 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

### Java Fall 2018 Margaret Reid-Miller

Java 15-121 Fall 2018 Margaret Reid-Miller 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

### Type Checking. Chapter 6, Section 6.3, 6.5

Type Checking Chapter 6, Section 6.3, 6.5 Inside the Compiler: Front End Lexical analyzer (aka scanner) Converts ASCII or Unicode to a stream of tokens Syntax analyzer (aka parser) Creates a parse tree

### Program 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

### 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

### 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

### Chapter 2. Outline. Simple C++ Programs

Chapter 2 Simple C++ Programs Outline Objectives 1. Building C++ Solutions with IDEs: Dev-cpp, Xcode 2. C++ Program Structure 3. Constant and Variables 4. C++ Operators 5. Standard Input and Output 6.

### JAVA Programming Concepts

JAVA Programming Concepts M. G. Abbas Malik Assistant Professor Faculty of Computing and Information Technology University of Jeddah, Jeddah, KSA mgmalik@uj.edu.sa Find the sum of integers from 1 to 10,

### Mathematical Functions, Characters, and Strings. CSE 114, Computer Science 1 Stony Brook University

Mathematical Functions, Characters, and Strings CSE 114, Computer Science 1 Stony Brook University http://www.cs.stonybrook.edu/~cse114 1 Static methods Remember the main method header? public static void

### CEN 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

### Lesson 02 Data Types and Statements. MIT 12043, Fundamentals of Programming By: S. Sabraz Nawaz Senior Lecturer in MIT Department of MIT FMC, SEUSL

Lesson 02 Data Types and Statements MIT 12043, Fundamentals of Programming By: S. Sabraz Nawaz Senior Lecturer in MIT Department of MIT FMC, SEUSL Topics Covered Statements Variables Constants Data Types

### 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

### Important Java terminology

1 Important Java terminology The information we manage in a Java program is either represented as primitive data or as objects. Primitive data פרימיטיביים) (נתונים include common, fundamental values as

### Motivations. Chapter 2: Elementary Programming 8/24/18. Introducing Programming with an Example. Trace a Program Execution. Trace a Program Execution

Chapter 2: Elementary Programming CS1: Java Programming Colorado State University Original slides by Daniel Liang Modified slides by Chris Wilcox Motivations In the preceding chapter, you learned how to

### Chapter 2: Basic Elements of Java

Chapter 2: Basic Elements of Java TRUE/FALSE 1. The pair of characters // is used for single line comments. ANS: T PTS: 1 REF: 29 2. The == characters are a special symbol in Java. ANS: T PTS: 1 REF: 30

### Lesson #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

### 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

### Chapter 2 Using Data. Instructor s Manual Table of Contents. At a Glance. A Guide to this Instructor s Manual:

Java Programming, Eighth Edition 2-1 Chapter 2 Using Data A Guide to this Instructor s Manual: We have designed this Instructor s Manual to supplement and enhance your teaching experience through classroom