Hi folks, what’s happening? My last tutorial was about Calculate circumference, area and perimeter in C. Let’s look at how to swap two numbers in C Programming Language.This is the sixth program of [I] section of Chapter 1:Getting Started of the book, “Let us C” by “Yashwant Kanetkar”.Do let us know if you have any doubts or suggestions in the comments section below.

## Question:

Two numbers are input through the keyboard in two locations C and D. Write a C program to interchange the contents of C and D.

## Solution to swap two numbers in C

We accept two numbers from the user. We write a function swap with two parameters to allocate the memory locations. We then use a temporary location to store a number and then swap the numbers. We then, display the swapped numbers in the console. This program also displays the use of pointers.

## Program to swap two numbers in C

```#include<stdio.h>
#include<conio.h>
void main()
{
int a,b;
clrscr();
printf("Enter two numbers separated by space: ");
scanf("%d%d",&a ,&b);
printf("\nBefore swapping: ");
printf("%d %d",a,b);
swap(&a,&b);
printf("\nAfter swapping: ");
printf("%d %d", a, b);
getch();
}
swap(int *x, int *y)
{
int t;
t = *x;
*x = *y;
*y = t;
}```

## Output

Enter two numbers separated by a space: 4 2

Before swapping: 4 2

After swapping: 2 4

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A highly motivated individual with a hunger to learn and share as much as I can about everything. Masters in Interaction Design with a Bachelors in Computer Science. I have worked with clients across the globe on various design and tech projects. I believe in giving back and that's how ReadMeNow was founded.