The Interview Question Today#26(25-3-19) (Swap two variables without using third variable.)

Question 

Swap two variables without using third variable.

Example:

Input: A=5, B=10

Output: A=10 B=5

Solution:

C program:

#include<stdio.h>

int main(){

int a=5,b=10;

    printf("\nBefore Swap: a= %d  b=  %d",a,b);

    a=a^b;

    b=a^b;

    a=b^a;

    printf("\nAfter Swap: a= %d  b=  %d",a,b);

}

Output:

Before Swap: a= 5  b=  10

After Swap: a= 10  b=  5