Palindrome Number in C

A palindrome number is a number that reads the same forwards and backwards. To check if a number is a palindrome in C, you can reverse the number and compare it with the original number. If they are the same, then the number is a palindrome. Here’s a C program to check for palindromic numbers:

#include <stdio.h>

int main() {
    int num, reversedNum = 0, originalNum, remainder;

    printf("Enter an integer: ");
    scanf("%d", &num);

    originalNum = num; // Store the original number

    // Reverse the number
    while (num > 0) {
        remainder = num % 10; // Extract the last digit
        reversedNum = reversedNum * 10 + remainder; // Append the digit to the reversed number
        num /= 10; // Remove the last digit
    }

    // Check if it's a palindrome
    if (originalNum == reversedNum) {
        printf("%d is a palindrome number.\n", originalNum);
    } else {
        printf("%d is not a palindrome number.\n", originalNum);
    }

    return 0;
}

In this program:

1. We input an integer from the user.
2. We store the original number in the originalNum variable for comparison later.
3. We reverse the number and store it in the reversedNum variable using a while loop. We extract the last digit of the number, append it to reversedNum, and remove the last digit from the original number in each iteration.
4. Finally, we compare the originalNum with the reversedNum to determine whether it’s a palindrome or not and print the result accordingly.

Compile and run the program, and it will check if the entered integer is a palindrome or not.