CSHARP

c# isdigit mehod

//IsDigit method
using System;
class Test 
{
  
    public static public void Main(String[] args)
    {
  		bool answer;
 		// checking if 1 is a digit or not
        char ch = '1';
        answer = Char.IsDigit(ch);
        Console.WriteLine(answer);
    }
}