Page 207 - ComputerScience_Class_11

Syntax: using while loop
initialisation;
while(condition)
{
if(condition)
{
break;
}
Statements inside loop;
increment or decrement;
}
1st statement after loop;
For example:

Program 10 Write a Java program that checks if a number is even or not.

1 import java.util.*;
2 class even
3 { public static void main(String[] args)
4 { Scanner sc= new Scanner(System.in);
5 int n, i, item;
6 System.out.println("Enter number of elements to be checked: ");
7 n=sc.nextInt();
8 for (i=1; i<=n; i++)
9 {
10 System.out.println("Enter a number: ");
11 item=sc.nextInt();
12 if(item == 0)
13 break;
14 if(item%2==0)
15 { System.out.println(item + " is an even number"); }
16 else
17 { System.out.println(item + " is not an even number"); }
18 }
19 }
20 }
The output of the preceding program is as follows:

BlueJ: Terminal Window - Java
Options

Enter number of elements to be checked:
2
Enter a number:
1
1 is not an even number
Enter a number:
2
2 is an even number

Statements and Scope 205