// Compute the average of a list of doubles.
// Input the list from a Scanner object.
// Terminate the list when nonnumeric input 
// is encountered.

import java.util.Scanner;
public class Average
{
    public static void main(String[ ] argv)
    {
        double sum = 0.0, average;
        int count = 0;
        Scanner console = new Scanner(System.in);

        while (console.hasNextDouble( ))
        {
            sum += console.nextDouble( );
            count++; 
        }
        average = sum / count;
        System.out.printf("The average is %5.2f.\n", average);
    }
}

// Keyboard input and screen output:
1
2
3
4
5
end
The average is  3.00.