Write a C program to input any two numbers from user and swap values of both numbers using bitwise operator. How to swap two number using bitwise operator in C programming.

**Example**

**Input**

Input first number: 22 Input second number: 65

**Output**

First number after swapping: 65 Second number after swapping: 22

## Required knowledge

Basic C programming, Bitwise operator

## Logic to swap two numbers using bitwise operator

There are tons of discussions going around the internet about swapping two numbers without using temporary variable (third variable). You can perform swapping of two numbers using bitwise XOR ^ operator. Bitwise XOR operator evaluates each bit of the result to `1`

if each corresponding bits of the two operands differ else evaluates to `0`

. Apart from this bitwise operator has an special property which is explained in below example.

Suppose two integer values a and b

Let's suppose x = a ^ b

Then again x ^ b will evaluate to a and x ^ a will evaluate to b.

## Program to swap two numbers

```
/**
* C program to swap two numbers using bitwise operator
*/
#include <stdio.h>
int main()
{
int num1, num2;
// Input two numbers from user
printf("Enter any two numbers: ");
scanf("%d%d", &num1, &num2);
printf("Original value of num1 = %d\n", num1);
printf("Original value of num2 = %d\n", num2);
num1 ^= num2;
num2 ^= num1;
num1 ^= num2;
printf("Num1 after swapping = %d\n", num1);
printf("Num2 after swapping = %d\n", num2);
return 0;
}
```

Output

Enter any two numbers: 22 65 Original value of num1 = 22 Original value of num2 = 65 Num1 after swapping = 65 Num2 after swapping = 22

Happy coding 😉

### Recommended posts

- Bitwise operator programming exercises index.
- C program to find one's complement of a binary number.
- C program to find two's complement of a binary number.
- C program to total number of zeros and ones in a binary number.
- C program to convert decimal to binary number system using bitwise operator.
- C program to check whether a number is even or odd using bitwise operator.

<pre><code> ----Your Source Code---- </code></pre>