Sum of Digits

Compute the sum of digits of a number.

BeginnerTopic: Module 3: Loop Programs
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Java Sum of Digits Program

This program helps you to learn the fundamental structure and syntax of Java programming.

Try This Code
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.print("Enter a number: ");
        int n = sc.nextInt();

        int sum = 0;
        while (n != 0) {
            sum += n % 10;
            n /= 10;
        }

        System.out.println("Sum of digits = " + sum);
        sc.close();
    }
}
Output
Enter a number: 1234
Sum of digits = 10

Understanding Sum of Digits

We peel digits one by one using modulo and division and add them to sum.

Note: To write and run Java programs, you need to set up the local environment on your computer. Refer to the complete article Setting up Java Development Environment. If you do not want to set up the local environment on your computer, you can also use online IDE to write and run your Java programs.

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Count Digits
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Count Digits

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