Question

Ask the user for integers. If the user did not enter an integer, ask again. (Type Safe Input) Keep a running total of the intergers entered (sum). Once the user enters 0, stop looping. Print the sum of all the numbers.

Enter an integer, 0 to stop> [fasdfsa]

Invalid input.

Enter an integer, 0 to stop> [231.342]

Invalid input.

Enter an integer, 0 to stop> [1]

Enter an integer, 0 to stop> [2]

Enter an integer, 0 to stop> [3]

Enter an integer, 0 to stop> [0]

The sum is: 6

Answer 1

import java.util.Scanner;

public class SafeTotal {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int number, total = 0;
        while (true) {
            System.out.print("Enter an integer, 0 to stop> ");
            try {
                number = in.nextInt();
                total += number;
                if (number == 0)
                    break;
            } catch (Exception e) {
                in.nextLine();
                System.out.println("Invalid input.");
            }
        }
        System.out.println("The sum is: " + total);
    }
}