C Programming Code Examples C > For Loops and While Loops Code Examples Write a C program to input number from user and check number is palindrome or not using loop. Write a C program to input number from user and check number is palindrome or not using loop. How to check whether a number is palindrome or not using loop in C programming. What is Palindrome number? Palindrome number is such number which when reversed is equal to the original number. For example: 121, 12321, 1001 etc. Input a number from user. Store it in some variable say j. Find reverse of the given number. Store it in some variable say reverse. Compare j with reverse. If both are same then the number is palindrome otherwise not. Program to check palindrome number #include <stdio.h> int main() { int n, j, rev = 0; /* Input a number from user */ printf("Enter any number to check palindrome: "); scanf("%d", &n); /* Copy original value to 'j' to 'n'*/ j = n; /* Find reverse of n and store in rev */ while(n != 0) { rev = (rev * 10) + (n % 10); n /= 10; } /* Check if reverse is equal to 'j' or not */ if(rev == j) { printf("%d is palindrome.", j); } else { printf("%d is not palindrome.", j); } return 0; }
