C program to Reverse a Number

Let’s see how to write a simple C program to Reverse a Number. I will use the “while loop” to reverse the number in this program. This program is very useful for school/college students and those who have recently been learning C programming.

#include <stdio.h>
int main() {
	int number, reverse = 0, remainder;
	printf("Reverse a number in C\n");
	printf("Enter a number:");
	scanf("%d", &number);
	while (number != 0) {
	  remainder = number % 10;
	  reverse = reverse * 10 + remainder;
	  number = number / 10;
	}
	printf("Reverse of the number is : %d", reverse);
	return 0;
}

Sample output of the above C program:

Reverse a number in C
Enter a number:654987
Reverse of the number is : 789456
--------------------------------
Process exited after 3.483 seconds with return value 0
Press any key to continue . . .

I hope this program clears your doubts on how to Reverse a number using C language.