public static void Main()
Console.WriteLine("Please enter your major:");
string major = Console.ReadLine();
Console.WriteLine("Please enter your score:");
string scoreInput = Console.ReadLine();
if (!int.TryParse(scoreInput, out score))
Console.WriteLine("Error: Please enter a valid whole number for the score.");
if (score < 0 || score > 100)
Console.WriteLine("Error: Score must be between 0 and 100.");
Console.WriteLine("You get A.");
if (major == "Information Systems")
Console.WriteLine("Congratulations! You are one of the best students in IS.");
Console.WriteLine("Congratulations! You are one of the best students.");
Console.WriteLine("You get B.");
Console.WriteLine("You get C.");
Console.WriteLine("You get D.");
Console.WriteLine("You get F.");