Question

Jave eclipse

Wanna help

Program 1 Algorithm

Problem statement:

Write a Java program to add up the digits of a number entered by the user and output the result.   You may not use an array top perform this task. The program should be able to handle an integer of any size.

For example, if the number 1256 was entered, the sum would be:

SumOfDigits = 1 + 2 + 5 + 6 = 14

Solution:

The following Algorithm could be used:

                Define variables

                Get input number

                                Get each digit of input number

                                Add digit to sumOfDigits

                Output sumOfDigits

loop

remainder = inputNumber % 10

sumOfDigits = sumOfDigits + remainder

inputNumber = inputNumber – remainder

inputNumber = inputNumber / 10

end loop

Some helpful code snippets:

To get length of input number

                int lenOfNum = String.valueOf(inputNum).length();

To get number from keyboard

                int inNumber = Integer.parseInt(s.nextLine()); // What about validating input?

Answer 1

import java.util.Scanner;
public class Main
{
   public static void main(String[] args) {
int inputNum, reminder, sum = 0;
Scanner s = new Scanner(System.in);
System.out.print("Enter the number:");
inputNum = Integer.parseInt(s.nextLine());
while(inputNum > 0)
{
reminder = inputNum % 10;
sum = sum + reminder;
inputNum = inputNum / 10;
}
System.out.println("Sum of Digits:"+sum);
}
}

Output: