Method return value(s)

The following method only returns the last value, not all the values in the while loop:

Code :

---

	public static String Addition(int length, String input)
	{
		String index = ""; 
		int add = 0, counter = 0;
 
 
 
		while(counter < length)
		{
			index = input.substring(add, add + 1);
			add = add + 1;
			counter++;
 
 
		}
 
		return index;	
	}

---

I want to return each iteration of index. Not just the last one.

To return more than one value, you will have to package them into an array, a class or some kind of collection that you can return.
Or call the method multiple times with the information that it needs to do each calculation and have it return the value from that calculation.

we'll I guess it will have to be an array right? Because I do not know the length, in the program I am using this in, the user inputs the input which determins the length.

If you do NOT know how many items will be input, then you'd better use an ArrayList.
When using an array you have to give it a fixed size when you define it. An ArrayList will grow as needed.