public static void Main()
Console.WriteLine("Please enter your letter grade");
letter_grade = Convert.ToString(Console.ReadLine());
Console.WriteLine("Numerical Equivalent: 99-100%");
Console.WriteLine("Description: Excellent");
else if (letter_grade == "A-")
Console.WriteLine("Numerical Equivalent: 96-98%");
Console.WriteLine("Description: Very Good");
else if (letter_grade == "B+")
Console.WriteLine("Numerical Equivalent: 93-95%");
Console.WriteLine("Description: Very Good");
else if (letter_grade == "B")
Console.WriteLine("Numerical Equivalent: 90-92%");
Console.WriteLine("Description: Good");
else if (letter_grade == "B-")
Console.WriteLine("Numerical Equivalent: 87-89%");
Console.WriteLine("Description: Good");
else if (letter_grade == "C+")
Console.WriteLine("Numerical Equivalent: 84-86%");
Console.WriteLine("Description: Satisfactory");
else if (letter_grade == "C")
Console.WriteLine("Numerical Equivalent: 81-83%");
Console.WriteLine("Description: Satisfactory");
else if (letter_grade == "C-")
Console.WriteLine("Numerical Equivalent: 78-80%");
Console.WriteLine("Description: Pass");
else if (letter_grade == "D")
Console.WriteLine("Numerical Equivalent: 75.00-77.74%");
Console.WriteLine("Description: Pass");
else if (letter_grade == "F")
Console.WriteLine("Numerical Equivalent: Below 75%");
Console.WriteLine("Description: Fail");
else if (letter_grade == "INC")
Console.WriteLine("Numerical Equivalent: N/A");
Console.WriteLine("Description: Incomplete");