Presentation is loading. Please wait.

Presentation is loading. Please wait.

Dale Roberts Program Control using Java - Boolean Expressions Dale Roberts, Lecturer Computer Science, IUPUI Department of.

Published byEmmeline Nicholson Modified over 9 years ago

Similar presentations

Presentation on theme: "Dale Roberts Program Control using Java - Boolean Expressions Dale Roberts, Lecturer Computer Science, IUPUI Department of."— Presentation transcript:

1 Dale Roberts Program Control using Java - Boolean Expressions Dale Roberts, Lecturer Computer Science, IUPUI E-mail: droberts@cs.iupui.edu Department of Computer and Information Science, School of Science, IUPUI

2 Dale Roberts 2 5.8 Logical Operators Logical operators Allows for forming more complex conditions Combines simple conditions Java logical operators && (conditional AND) || (conditional OR) & (boolean logical AND) | (boolean logical inclusive OR) ^ (boolean logical exclusive OR) ! (logical NOT)

3 Dale Roberts 3 5.8 Logical Operators (Cont.) Conditional AND ( && ) Operator Consider the following if statement if ( gender == FEMALE && age >= 65 ) ++seniorFemales; ++seniorFemales; Combined condition is true if and only if both simple conditions are true Combined condition is false if either or both of the simple conditions are false

4 Dale Roberts 4 Fig. 5.14 | && (conditional AND) operator truth table.

5 Dale Roberts 5 5.8 Logical Operators (Cont.) Conditional OR ( || ) Operator Consider the following if statement if ( ( semesterAverage >= 90 ) || ( finalExam >= 90 ) System.out.println( “Student grade is A” ); System.out.println( “Student grade is A” ); Combined condition is true if either or both of the simple condition are true Combined condition is false if both of the simple conditions are false

6 Dale Roberts 6 Fig. 5.15 | || (conditional OR) operator truth table.

7 Dale Roberts 7 5.8 Logical Operators (Cont.) Short-Circuit Evaluation of Complex Conditions Parts of an expression containing && or || operators are evaluated only until it is known whether the condition is true or false E.g., ( gender == FEMALE ) && ( age >= 65 ) Stops immediately if gender is not equal to FEMALE

8 Dale Roberts 8 5.8 Logical Operators (Cont.) Boolean Logical AND ( & ) Operator Works identically to && Except & always evaluate both operands Boolean Logical OR ( | ) Operator Works identidally to || Except | always evaluate both operands

9 Dale Roberts 9 5.8 Logical Operators (Cont.) Boolean Logical Exclusive OR ( ^ ) One of its operands is true and the other is false Evaluates to true Both operands are true or both are false Evaluates to false Logical Negation ( ! ) Operator Unary operator

10 Dale Roberts 10 Fig. 5.16 | ^ (boolean logical exclusive OR) operator truth table.

11 Dale Roberts 11 Fig. 5.17 | ! (logical negation, or logical NOT) operator truth table.

12 Dale Roberts 12 Fig. 5.19 | Precedence/associativity of the operators discussed so far.

13 Dale Roberts Acknowledgements Deitel, Java How to Program

Download ppt "Dale Roberts Program Control using Java - Boolean Expressions Dale Roberts, Lecturer Computer Science, IUPUI Department of."

Similar presentations

Dale Roberts Department of Computer and Information Science, School of Science, IUPUI Dale Roberts, Lecturer Computer Science, IUPUI

Dale Roberts Department of Computer and Information Science, School of Science, IUPUI Dale Roberts, Lecturer Computer Science, IUPUI
 2006 Pearson Education, Inc. All rights reserved. 1 6 6 Control Statements: Part 2.

 2006 Pearson Education, Inc. All rights reserved Control Statements: Part 2.
 1992-2007 Pearson Education, Inc. All rights reserved. 1 5.7 break and continue Statements Break and continue statements – Alter flow of control break.

 Pearson Education, Inc. All rights reserved break and continue Statements Break and continue statements – Alter flow of control break.
Control Structures: Part 2. Introduction Essentials of Counter-Controlled Repetition For / Next Repetition Structure Examples Using the For / Next Structure.

Control Structures: Part 2. Introduction Essentials of Counter-Controlled Repetition For / Next Repetition Structure Examples Using the For / Next Structure.
ECE122 L7: Conditional Statements February 20, 2007 ECE 122 Engineering Problem Solving with Java Lecture 7 Conditional Statements.

ECE122 L7: Conditional Statements February 20, 2007 ECE 122 Engineering Problem Solving with Java Lecture 7 Conditional Statements.
Program Control Dilshad M. Shahid New York

Program Control Dilshad M. Shahid New York
1 Lecture 7:Control Structures I (Selection) Introduction to Computer Science Spring 2006.

1 Lecture 7:Control Structures I (Selection) Introduction to Computer Science Spring 2006.
 2005 Pearson Education, Inc. All rights reserved. 1 5 5 Control Statements: Part 2.

 2005 Pearson Education, Inc. All rights reserved Control Statements: Part 2.
Liang, Introduction to Java Programming, Sixth Edition, (c) 2007 Pearson Education, Inc. All rights reserved. 0-13-222158-61 Control Statements.

Liang, Introduction to Java Programming, Sixth Edition, (c) 2007 Pearson Education, Inc. All rights reserved Control Statements.
Dale Roberts Object Oriented Programming using Java - Class Constructors Dale Roberts, Lecturer Computer Science, IUPUI Department.

Dale Roberts Object Oriented Programming using Java - Class Constructors Dale Roberts, Lecturer Computer Science, IUPUI Department.
 2006 Pearson Education, Inc. All rights reserved. 1 3 3 Control Statements: Part 1: Selection statements: if, if…else, switch.

 2006 Pearson Education, Inc. All rights reserved Control Statements: Part 1: Selection statements: if, if…else, switch.
CSci 125 Lecture 10 Martin van Bommel. Simple Statements Expression followed by semicolon Assignments total = n1 + n2; Function calls printf(”Hello.\n”);

CSci 125 Lecture 10 Martin van Bommel. Simple Statements Expression followed by semicolon Assignments total = n1 + n2; Function calls printf(”Hello.\n”);
Dale Roberts Introduction to Java - Access Specifiers Dale Roberts, Lecturer Computer Science, IUPUI Department of Computer.

Dale Roberts Introduction to Java - Access Specifiers Dale Roberts, Lecturer Computer Science, IUPUI Department of Computer.
Problem Solving and Control Statements. Using Exit to Terminate Repetition Statements There are many forms of the Exit statement, designed to terminate.

Problem Solving and Control Statements. Using Exit to Terminate Repetition Statements There are many forms of the Exit statement, designed to terminate.
© 2006 Pearson Education 1 Obj: to use compound Boolean statements HW: p.184 True/False #1 – 6 (skip 3)  Do Now: 1.Test your “Charge Account Statement”

© 2006 Pearson Education 1 Obj: to use compound Boolean statements HW: p.184 True/False #1 – 6 (skip 3)  Do Now: 1.Test your “Charge Account Statement”
Control Structures Week 3. 2.1 Introduction -Representation of the theory and principles of structured programming. Demonstration of for, while,do…whil.

Control Structures Week Introduction -Representation of the theory and principles of structured programming. Demonstration of for, while,do…whil.
1 CSCE 1030 Computer Science 1 Control Statements in Java.

1 CSCE 1030 Computer Science 1 Control Statements in Java.
T U T O R I A L  2009 Pearson Education, Inc. All rights reserved. 1 8 Dental Payment Application Introducing CheckBox es and Message Dialogs.

T U T O R I A L  2009 Pearson Education, Inc. All rights reserved. 1 8 Dental Payment Application Introducing CheckBox es and Message Dialogs.
Dale Roberts Object Oriented Programming using Java - Enumerations Dale Roberts, Lecturer Computer Science, IUPUI Department.

Dale Roberts Object Oriented Programming using Java - Enumerations Dale Roberts, Lecturer Computer Science, IUPUI Department.
Selection Boolean What is Boolean ? Boolean is a set with only two values : –true –false true and false are standard identifiers in Pascal, called Boolean.

Selection Boolean What is Boolean ? Boolean is a set with only two values : –true –false true and false are standard identifiers in Pascal, called Boolean.

Similar presentations

Ads by Google