2. (A) Write a program to swap two numbers without using third variable.

2. (A) Write a program to swap two numbers without using third variable. 

	#include<stdio.h>
	int main() {
	int a, b;
	printf("\nEnter value for num1 & num2 : ");
	scanf("%d %d", &a, &b);
	a = a + b;
	b = a - b;
	a = a - b;
	printf("\nAfter swapping value of a : %d", a);
	printf("\nAfter swapping value of b : %d", b);
	return (0);
	}