SELECTIONS - Introduction to Java Programming: Comprehensive Version - page 94

T ABLE 3.5

Truth Table fo r Operator &&

p 1 p 2 p 1 && p 2 Example (assume age = 24, weight = 140 )

false false false

(age > 28) && (weight <= 140) is true ,
because (age > 28) is false .

false true false

true false false

(age > 18) && (weight >= 140) is true ,
because (age > 18) and (weight >= 140) are
both true .

true true true

T ABLE 3.6 Truth Table for Operator ||

p 1 p 2 p 1 || p 2 Example (assume age = 24, weight = 140 )

false false false (age > 34) || (weight >= 150) is false , because

(age > 34) and (weight >= 150) are both false .

false true true

true false true (age > 18) || (weight < 140) is true , because

(age > 18) is true .

true true true

T ABLE 3.7 Truth Table for Operator ^

p 1 p 2 p 1 ^ p 2 Example (assume age = 24, weight = 140 )

false false false (age > 34) ^ (weight > 140) is false , because (age > 34) and

(weight > 140) are both false .

false true true (age > 34) ^ (weight >= 140) is true , because (age > 34) is

false but (weight >= 140) is true .

true false true

true true false

Listing 3.6 gives a program that checks whether a number is divisible by 2 and 3 , by 2 or
3 , and by 2 or 3 but not both:

L ISTING 3.6

TestBooleanOperators.java
1 import java.util.Scanner;
2
3 public class TestBooleanOperators {
4 public static void main(String[] args) {
5 // Create a Scanner
6 Scanner input = new Scanner(System.in);
7
8 // Receive an input
9 System.out.print( "Enter an integer: " );
10

import class

int number = input.nextInt(); input

11
12 if (number % 2 == 0 && number % 3 == 0 )
13 System.out.println(number + " is divisible by 2 and 3." );
14

and