Question

How to determines whether a character is a letter or a digit in C#

Answer 1

using System;

namespace ConsoleApplication_C_Sharp
{
    class Program
    {
        static void Main(string[] args)
        {

            char ch = '9';

            if (Char.IsLetter(ch) || Char.IsDigit(ch))
                Console.WriteLine("yes");
            else
                Console.WriteLine("no");

            ch = 'a';

            if (Char.IsLetter(ch) || Char.IsDigit(ch))
                Console.WriteLine("yes");
            else
                Console.WriteLine("no");

            ch = '@';

            if (Char.IsLetter(ch) || Char.IsDigit(ch))
                Console.WriteLine("yes");
            else
                Console.WriteLine("no");
        }
    }
}


/*
run:
    
yes
yes
no

*/

 

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