Question

write a program to input unequal numbers and display after swapping them

Answer 1

Answer:

CODE:

import java.util.*;

class Swapping

{

public static void main(String args[])

{

Scanner sc=new Scanner(System.in);

System.out.println("Enter 2 numbers");

int a=sc.nextInt();

int b=sc.nextInt();

a=a+b;

b=a-b;

a=a-b;

System.out.println("Swapped value of a :"+b);

System.out.println("Swapped value of b :"+a);

}

}

LOGIC:

First note the step :

a = a + b

Then b = a - b

= > b = a + b - b [ from above ]

= > b = a

then a = a - b

= > a = a  - (  a - b )

= > a = a - a + b

= > a = b

That is the way they are swapped !

Explanation:

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Answer 2

Answer:

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