Program That Allows User To Enter Up To 10 Integer Grades Into Array

package question.pkg3;
import java.util.Scanner;
public class Question3 {
public static void main(String[] args) {
// TODO code application logic here
Scanner Luka=new Scanner(System.in);
double sum=0;double count=0;
int[] a=new int[10];

[code]....

I'm required to write a program that allows the user to enter up to 10 integer grades into an array. Stop the loop by typing in ‐1. Your main method should call an Average method that returns the average of the grades.I There's something wrong with my program , the count always stays 0 and the sum is always 1 less than the actual sum.Sample input and output :

Enter grade 1: 8
Enter grade 2: 9
Enter grade 3: 10
Enter grade 4: 5
Enter grade 5: 8
Enter grade 6: 9
Enter grade 7: -1
output

Average grade is 8.1666666667On line 13 I had count=count+1 ;