Example: Sum of Digits using Do-While Loop in Java

// Sum of Digits using Do-While Loop
import java.util.Scanner;

// Main class containing the entry point of the program
public class Main {
    public static void main(String[] args) {
        // Step 1: Create a Scanner object to read user input
        Scanner scanner = new Scanner(System.in);

        // Step 2: Prompt the user to enter a number
        System.out.print("Enter a number: ");
        int number = scanner.nextInt();

        // Step 3: Initialize sum to 0
        int sum = 0;
        int originalNumber = number; // Store the original number for output

        // Step 4: Use a do-while loop to calculate the sum of digits
        // The loop continues as long as the number is not 0
        do {
            // Get the last digit of the number
            int digit = number % 10;

            // Add the digit to the sum
            sum += digit;

            // Remove the last digit from the number
            number /= 10;
        } while (number != 0);

        // Step 5: Print the result
        System.out.println("The sum of digits of " + originalNumber + " is: " + sum);

        // Step 6: Close the scanner
        scanner.close();
    }
}