Storing multiple double numbers without an array

Question

So for the problem the user will enter as many double numbers as the want until they enter a negative number then it will stop the loop.

However I don't know how I would store all these numbers since I don't know how many the user will input and I can't use an array for this problem.

It's unclear what problem you need to solve in the first place. From your description, you don't need to store anything. Just let the user enter numbers, and stop the loop when it's negative. So all you need to know is the value of the last entered number. — JB Nizet, Oct 12 '19 at 23:26

score 1 · Answer 1 · answered Oct 12 '19 at 23:00

You can use a List as such:

public static void main(String[] args)
    {
        Scanner keyboard = new Scanner(System.in);
        List<Double> allValues = new ArrayList<>();
        double enteredValue;

        do{
            System.out.println("Enter a value");
            enteredValue = keyboard.nextDouble();
            allValues.add(enteredValue);
        } while (enteredValue >= 0);
    }

Storing multiple double numbers without an array

1 Answers1