Page 193 - Computer science 868 Class 12
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In the above example, the variables var1 and var2 are assigned with the values 1 and 10 respectively and after each
iteration var1 is increased by 1 and var2 is decreased by 1.
7.4 JUMP STATEMENTS
Sometimes it is necessary to exit from a loop or a switch statement before the condition results in false. This is required
according to the need of the logic of the program. This type of statement which transfers the execution control of the
program code from one point to another point depending on a certain condition is called a Jump Statement.
In Java, there are three types of Jump Statements.
• break
• continue
• return
Let us study this in detail.
7.4.1 break
The break statement is used to exit from the loop and switch case statement. As soon as the break statement is
encountered, the control shifts to the next line just after the switch case or the loop.
For example:
1. Break in switch case: Input the length and breadth of a rectangle and calculate the area or perimeter according to
the user’s choice.
class switchcase
{
public static void main(char ch, int length, int breadth)
{
switch(ch)
{
case 'A':
System.out.println("Area : " + (length*breadth));
break;
case 'P':
System.out.println("Perimeter : " + (2*(length + breadth)));
break;
default:
System.out.println("Your choice is wrong");
}
}
}
2. Break in loop: Input some numbers and print the sum of the positive numbers only. If the user enters zero, the loop
terminates and the result is displayed.
import java.util.*;
class sum_of_even
{ public static void main()
{ Scanner sc=new Scanner(System.in);
int n, sum=0;
while(true)
{
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Statements and Scope 191

