Swap two numbers without using temporary or Third 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. In this program I’ll not use the third variable to swap numbers.

Implementation: let's create a program to swap the value of two numbers without using third variable.

#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=1

Enter the value of b=2

Value of a before swapping=1

Value of b before swapping=2

Value of a after swapping=2

Value of b after swapping=1