Write a C program to check whether a number is a palindrome

Description: Take a number as input. Print if it is a palindrome (it reads the same from both sides), like 121.

Hint:

• Reverse the number, and compare it with the original.

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C program to check a palindrome number

#include <stdio.h>

int main(void) {
    int n, original, reversed = 0;

    printf("Enter a number: ");
    scanf("%d", &n);
    original = n;

    while (n > 0) {
        reversed = reversed * 10 + n % 10;
        n /= 10;
    }

    if (original == reversed) {
        printf("%d is a palindrome\n", original);
    } else {
        printf("%d is not a palindrome\n", original);
    }
    return 0;
}

Output:

How it works

• We keep a copy in original, because the loop changes n.
• 121 reversed is 121, so both are equal.

Read Reverse a Number.

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