using System;
public class Exercise18
{
    static void Main()
    {
        Console.Write("\n\nCheck whether a character is alphabet or not and if so, check for case :\n");
        Console.Write("-----------------------------------------------------------------------------\n");
        Console.Write("Input a character: ");
        char ch = (char)Console.Read();
        if (Char.IsLetter(ch))
            {
                if (Char.IsUpper(ch))
                    {
                        Console.WriteLine("\nThe character is uppercase.\n");
                    }
                else
                    {
                        Console.WriteLine("\nThe character is lowercase.\n");
                    }
            }
        else
            {
                Console.WriteLine("\nThe entered character is not an alphabetic character.\n");
            }
    }
}