C Program to Reverse a Number & Check if it is a Palindrome

This C Program reverses a number & checks if it is a palindrome or not. First it reverses a number. Then it checks if given number and reversed numbers are equal. If they are equal, then its a palindrome. Here is source code of the C program to reverse a number & checks it is a palindrome or not. The C program is successfully compiled and run on a Linux system. The program output is also shown below.

1. /*

2.  * C program to reverse a given integer number and check

3.  * whether it is a palindrome. Display the given number

4.  * with appropriate message

5.  */

6. #include <stdio.h>

8. void main()

9. {

10.     int num, temp, remainder, reverse = 0;

12.     printf("Enter an integer \n");

13.     scanf("%d", &num);

14.     /*  original number is stored at temp */

15.     temp = num;

16.     while (num > 0)

17.     {

18.         remainder = num % 10;

19.         reverse = reverse * 10 + remainder;

20.         num /= 10;

21.     }

22.     printf("Given number is = %d\n", temp);

23.     printf("Its reverse is  = %d\n", reverse);

24.     if (temp == reverse)

25.         printf("Number is a palindrome \n");

26.     else

27.         printf("Number is not a palindrome \n");

28. }

$ cc pgm13.c
$ a.out
Enter an integer
6789
Given number is = 6789
Its reverse is  = 9876
Number is not a palindrome
 
$ a.out
Enter an integer
58085
Given number is = 58085
Its reverse is  = 58085
Number i