using System;
public class Program
{
public static void Main()
int num = 3, count = 0;
int grade = -1;
int sum = 0;
while (count<num) //X num times
while (grade < 0 || grade > 100)
Console.WriteLine("Please enter grade");
grade = int.Parse(Console.ReadLine());
}
sum = sum + grade;
count++;
grade = -1;
Console.WriteLine("Average is: " + sum / num);