Example: Palindrome Number Program in Java using While loop

// Palindrome Number Program in Java using While loop
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
    	Scanner in = new Scanner(System.in);

        System.out.println("Enter an integer number::\n");

        int x = in.nextInt(),
            r,
            rN = 0,
            oN;
        
        // rN - To store the reverse number
        // oN - To store the original number
        // r - To store the remainder

        oN = x;

        // this reverse number will be stored during iteration
        while (x != 0) {
            r = x % 10;
            rN = rN * 10 + r;
            x /= 10;
        }

        // if the original number will match with reverse then palindrome case will be true
        if (oN == rN) {
            System.out.println ("This " + oN + " is a palindrome number.");
        } else {
            System.out.println ("This " + oN + " is not a palindrome number!");
        }
    }
}