using System;
public class Program
{
public static void Main()
int i,sum = 0,avg;
int [] student = new int [6];
for (i=0; i<=5; i++)
Console.Write("insert a grade: ");
student [i] = int.Parse(Console.ReadLine());
sum += student[i];
}
Console.WriteLine("the sum is:{0}", sum);
avg = sum/6;
Console.WriteLine("the average is:{0}",avg);
if student