1. Introduction

A Palindrome Number is a number that remains the same when its digits are reversed. For example, 121 is a palindrome number, but 123 is not. In this blog post, we will create a Java program to check whether a given number is a palindrome number or not.

2. Program Steps

1. Define a class named PalindromeNumber.

2. Inside this class, define the main method.

3. Inside the main method, create a Scanner object to take user input.

4. Prompt the user to enter a number.

5. Declare and initialize variables to store the original number, reversed number, and remainder.

6. Create a loop to reverse the number.

7. Compare the reversed number with the original number.

8. Print whether the number is a palindrome number or not.

3. Code Program

import java.util.Scanner; // Import Scanner class

public class PalindromeNumber { // Step 1: Define a class named PalindromeNumber

    public static void main(String[] args) { // Step 2: Define the main method

        Scanner sc = new Scanner(System.in); // Step 3: Create Scanner object to read input

        System.out.println("Enter a number: "); // Step 4: Prompt the user to enter a number
        int num = sc.nextInt(); // Read the user input

        int originalNum = num; // Step 5: Store the original number
        int reversedNum = 0; // Initialize reversedNum to 0

        // Step 6: Create a loop to reverse the number
        while (num != 0) {
            int remainder = num % 10; // Get the last digit
            reversedNum = reversedNum * 10 + remainder; // Reverse the number
            num /= 10; // Remove the last digit
        }

        // Step 7: Compare the reversed number with the original number
        if (originalNum == reversedNum) {
            System.out.println(originalNum + " is a Palindrome Number."); // Step 8: Print the result
        } else {
            System.out.println(originalNum + " is not a Palindrome Number."); // Step 8: Print the result
        }
    }
}

Output:

Enter a number:
121
121 is a Palindrome Number.

4. Step By Step Explanation

– Step 1: A class named PalindromeNumber is defined.

– Step 2: The main method is defined inside the PalindromeNumber class.

– Step 3: A Scanner object is created to read the user input.

– Step 4: The user is prompted to enter a number.

– Step 5: The original number is stored and variables for reversedNum and remainder are initialized.

– Step 6: A while loop is used to reverse the number.

– Step 7: The reversed number is compared with the original number.

– Step 8: The program prints whether the original number is a Palindrome Number or not.