How to swap two numbers without using temporary variable in C Language?

Introduction: In this article i will explain How to swap/interchange the values of two numbers using C language with an example program.

Description: Swapping the value of two numbers in C Language is off course a very easy task. But how many of us actually know that there are multiple ways to swap the value of two variables in C language. There are a number of ways to swap the value of two numbers in C Language.  In this article I am going to use Addition (+) and Subtraction (-) arithmetic operators to help in swapping. In previous articles How to swap two numbers in C Language ? I explained how to swap two numbers using temporary variable and in another article Another way to swap two numbers without using temporary variable in C Language? i explained one more way to swap two numbers in C Language .

Implementation: let's create a program to swap the value of two numbers.

#include<stdio.h>

#include<conio.h>

void main()

{

 int a,b;

  clrscr();

 printf("Enter the value of a= ");

 scanf("%d",&a);

 printf("\nEnter the value of b= ");

 scanf("%d",&b);

 printf("\nValue of a before swapping= %d",a);

 printf("\nValue of b before swapping= %d",b);

 a=a+b;

 b=a-b;

 a=a-b;

 printf("\nValue of a after swapping= %d",a);

 printf("\nValue of b after swapping= %d",b);

 getch();

 }

Run the program using Ctrl+F9

Output:

Enter the value of a=10

Enter the value of b=20

Value of a before swapping=10

Value of b before swapping=20

Value of a after swapping=20

Value of b after swapping=10

Now over to you:

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