Question

How to check if character is letter in C#

Answer 1

using System;
 
class Program
{
    static void Main() {
        string s = "c# programming";
         
        if (Char.IsLetter(s[3])) 
            Console.WriteLine("yes");
        else
            Console.WriteLine("no");
            
            
        char ch = 'a';
        
        if (Char.IsLetter(ch)) 
            Console.WriteLine("yes");
        else
            Console.WriteLine("no");
    }
}
 
 
 
/*
run:
 
yes
yes
 
*/

 

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Answer 2

using System;
 
public class Program
{
    public static void Main(string[] args)
    {
        Console.WriteLine(char.IsLetter('a'));
        Console.WriteLine(char.IsLetter('9'));
    }
}
 
 
 
/*
run:
   
true
false
    
*/

 

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