C Programming Code Examples C > Mathematics Code Examples How to Check Whether a Number is Palindrome or Not How to Check Whether a Number is Palindrome or Not An integer is a palindrome if the reverse of that number is equal to the original number. #include <stdio.h> int main() { int n, reversedInteger = 0, remainder, originalInteger; printf("Enter an integer: "); scanf("%d", &n); originalInteger = n; // reversed integer is stored in variable while( n!=0 ) { remainder = n%10; reversedInteger = reversedInteger*10 + remainder; n /= 10; } // palindrome if orignalInteger and reversedInteger are equal if (originalInteger == reversedInteger) printf("%d is a palindrome.", originalInteger); else printf("%d is not a palindrome.", originalInteger); return 0; }