Is char a digit

In this chapter you will learn:

How to use Char.IsDigit to find out if a char is a digit

Char.IsDigit method

using System;  //j a v  a2  s  . c om
  
class MainClass {     
  public static void Main() {     
    string str = "This is a test. $23"; 
    int i; 
 
    for(i=0; i < str.Length; i++) { 
      Console.Write(str[i] + " is"); 
      if(Char.IsDigit(str[i])) 
        Console.Write(" digit"); 
 
      Console.WriteLine(); 
    } 
 
  }     
}