using System;

​

public class Program

{

    public static void CharactersCount(string charInput)

    {

        int letterCount = 0;

        int numberCount = 0;

        int specialCharCount = 0;

        int totalCharsCount = 0;

        char[] strArray = charInput.ToCharArray();

        for(int i = 0; i < strArray.Length; i++)

        {

             if (strArray[i] >= 'A' && strArray[i] <= 'Z' || strArray[i] >= 'a' && strArray[i] <= 'z')

             {

                 letterCount++;

             }

             else if(strArray[i] >= '0' && strArray[i] <= '9')

             {

                 numberCount++;

             }

             else if(strArray[i] != 'A' && strArray[i] != 'Z' && strArray[i] != 'a' && strArray[i] != 'z' && strArray[i] != '0' && strArray[i] != '9')

             {

                 specialCharCount++;

             }

             totalCharsCount++;

        }

        Console.WriteLine("Letter count: " + letterCount++);

        Console.WriteLine("Number count: " + numberCount++);

        Console.WriteLine("Special character count: " + specialCharCount);

        Console.WriteLine("Total number of characters: " + totalCharsCount);

        return;

    }

    public static void Main(string[] args)

    {

        string input;

        Console.WriteLine("Count the Characters v1");

        Console.Write("Enter a string: ");

        input = Console.ReadLine();

        if(input == "")

        {

            Console.WriteLine("No input. Please input a string.");

        }

        else

        {

            CharactersCount(input);

        }

    }

}

​