Help with while loop

I am trying to write a program that takes an int as input. Then it prints out the number with spaces and the sum. Example:

input: 123
output: 1 2 3 The sum is: 6


here is the output I am getting: 1 The sum is: 6

here is my code

Code :

---

import java.util.*;
 
public class ch5PrEx1
{
	static Scanner console = new Scanner(System.in);
 
	public static void main(String[] args)
	{
	  String input;
	  int sum = 0, numericInput, length;
 
	  System.out.println("Please enter an integer: ");
	  System.out.println();
 
	  input = console.next();
	  numericInput = Integer.parseInt(input);
	  numericInput = Math.abs(numericInput);
	  input = Integer.toString(numericInput);
 
	  length = input.length();
 
 
	  System.out.println(input.charAt(length-length) + " " + Addition(length, input) + " " + "The sum is: " + Sum(sum, length, numericInput));
 
 
 
	}
 
	public static int Sum(int sum, int length, int numericInput)
	{
		int counter = 0;
		while(counter < length)
		{
 
			sum += numericInput % 10;
			numericInput /= 10;
			counter = counter + 1;
		}
 
		return sum;	
	}
 
	public static String Addition(int length, String input)
	{
		String output = " ", index; 
		int add = 0, counter = 0;
 
 
 
		while(counter < length)
		{
			index = input.substring(add + 1, add + 1);
			output = String.format("%s", index);
			add = add + 1;
			counter++;
 
 
		}
 
		return output;
 
 
 
	}
 
}

---

Thanks in advance!

Quote:

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Originally Posted by mwr76

System.out.println(input.charAt(length-length) + " " + Addition(length, input) + " " + "The sum is: " + Sum(sum, length, numericInput));

---

IF you look at the first thing you put in this Print statement:
"input.charAt(length-length)" -> no matter the value of length, the value of "length-length" will be 0.

Therefore, you will print out the String's Index of 0, which will always be the first number. In order to print out all of the values, you will need a method to do so...

I do have a method to do that Addition(). I want it to print the index at 0 first then print the rest of the indexes. Which the Addition methods does, except it only returns the last value.

Addition() (that's a bad name for a Java method - follow the convention in the API - you should be using a lowerCaseFirstLetter()) uses String.subtring(int, int) where both ints are the same. Read the API doc for that method - particularly the bit around

Quote:

---

Thus the length of the substring

---

Here's a tip:

Your output is this (_ is the equivalent to a space):

1__The_sum_is:_6

And inside your println parameters you have..

input.charAt(length-length) + " " + Addition(length, input) + " " + "The sum is: " + Sum(sum, length, numericInput)

Therefore..

"1_" = input.charAt(length-length) + " "
"_" = Addition(length, input)
"The_sum_is:_6" = "The sum is: " + Sum(sum, length, numericInput)

Try to locate the source of your error... and after all of this is done, (if you'd like) I can show you my approach to this program.