1. using System;
class gread{
static void Main() {
Console.Write("Input your score = = >> ");
double score = double.Parse(Console.ReadLine());
if (score<=49)
Console.WriteLine(“Gread 0”);
else if (score<=54)
Console.WriteLine(“Gread 1”);
else if (score<=59)
Console.WriteLine(“Gread 1.5”);
else if (score<=64)
Console.WriteLine(“Gread 2”);
else if (score<=69)
Console.WriteLine(“Gread 2.5”);
else if (score<=74)
Console.WriteLine(“Gread 3”);
else if (score<=79)
Console.WriteLine(“Gread 3.5”);
else
Console.WriteLine(“Gread 4”);
System. Console.ReadLine();
}
}