# C program to swap two numbers using third variable Ans:

In this tutorial you will learn swapping of two numbers using third variable C in  programming language.

You can also see swapping of two number in C without using third variable.

## How our program will behave?

In the swapping program using third variable we will assign two different value to two different variables.

We have also a third variable to store temporary variable in it.

Example of swapping : a=2 and b=4

Now after execution of swapping program output will be like

a=4 and b = 2

## Swapping of two numbers using third variable in C language

``````#include<stdio.h>
#include<conio.h>
void main(){
int a,b,tempvar;
printf("enter the value of a: ");
scanf("%d",&a);
printf("enter the value of b: ");
scanf("%d",&b);
tempvar=a;
a=b;
b=tempvar;
printf("After swapping \n");
printf("value of a is : %d\n",a);
printf("value of b is : %d ",b);
getch();
} ``````

Output: ## Explanation of the above program

• Above program is for swapping two number in C using third variable.
• In the above program there are three variables a, b  in which we assign the user inputs and tempvar is to persist the one variable value.
• Here the logic is very simple. We are just exchanging the value with no any mathematical calculation.
• We are assigning the value of a in tempvar and then value of b into a. And at last tempvar value into b.
• Only this is the simple logic.

I hope this is clear to you.