public static void Main()
Console.WriteLine( "Enter Grade in Makabayan: ");
firstNum = int.Parse( Console.ReadLine());
Console.WriteLine(" Enter Grade in Science: ");
secondNum = int.Parse( Console.ReadLine());
Console.WriteLine(" Enter Grade in Math: ");
thirdNum = int.Parse( Console.ReadLine());
Console.WriteLine(" Enter Grade in English: ");
fourthNum = int.Parse( Console.ReadLine());
double y= firstNum + secondNum + thirdNum + fourthNum;
Console.WriteLine(" The Average Grade is: "+y/4);