Java: Adds all the digits in the integer between 0 and 1000

Java Data Type: Exercise-3 with Solution

Sum of Digits in Integer

Write a Java program that reads an integer between 0 and 1000 and adds all the digits in the integer.

An integer is a number that can be written without a fractional component. For example, 23, 6, 0, and −1245 are integers, while 3.25, ​7 1⁄2, and √3 are not.

Test Data
Input an integer between 0 and 1000: 565

Sample Solution:

Java Code:

import java.util.Scanner;
public class Main {

    public static void main(String[] Strings) {

        Scanner input = new Scanner(System.in);

        System.out.print("Input an integer between 0 and 1000: ");
        int num = input.nextInt();

        int firstDigit = num % 10;
        int remainingNumber = num / 10;
        int SecondDigit = remainingNumber % 10;
        remainingNumber = remainingNumber / 10;
        int thirdDigit = remainingNumber % 10;
        remainingNumber = remainingNumber / 10;
        int fourthDigit = remainingNumber % 10;
        int sum = thirdDigit + SecondDigit + firstDigit + fourthDigit;
        System.out.println("The sum of all digits in " + num + " is " + sum);

    }
}

Sample Output:

Input an integer between 0 and 1000: 565                                                                      
The sum of all digits in 565 is 16 

Flowchart:

Java Code Editor:

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