Having issue with a Sum/Average program

Question

The issue I get when I run the command is, let's say I enter 4 numbers, 5, 7, 9, 16 then enter a 0 to end the count, the avg it gives me is 8.0 instead of the 9.25 it should be. Any insight would be greatly appreciated.
import java.util.Scanner;
public class StephenVanoverSumAverage
    public static void main(String[] args)
          Scanner keyboard = new Scanner(System.in);
        double count = 0.0;      
        double sum = 0.0;   
          double num;
        System.out.println("Enter a number (Type 0 to quit): ");
          num = keyboard.nextInt();
        while ( num !=0 )
               System.out.println("Enter a number (Type 0 to quit): ");
               num = keyboard.nextInt();
            sum += num;
            count++;
        double average = sum / count;
        System.out.printf("Average is " + average);
}

Answer 1

Not quite, since the first number is discarded. The zero is included in the sum, but the first number entered is not. The count is incremented for the zero, true, but I think that is not the problem.
Still, the code could be cleaner with respect to both when the count is incremented, and what numbers are included in the sum.
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