C Program to Swap Two Numbers without using Third Variable1 min read

In this tutorial, we will write a C program to swap two numbers without using a temporary variable. There are two ways to swap variables.

  1. Using + and
  2. Using * and /

Let us go through each of them with a C program. You may check out the following program.


C Program to Swap Two Numbers without using Third Variable

1. Using + and –

Output:

Enter a: 10
Enter b: 20
The swapped values a: 20 and b: 10


2. Using * and /

Output:

Enter a: 10
Enter b: 20
The swapped values a: 20 and b: 10

Note that the swapping using / and * will not work if one of the swapping values is zero (0).


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