using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Enter your age:");

        String userage = Console.ReadLine();

        int result;

        bool ageConversion = int.TryParse(userage, out result);

        if(ageConversion){

            Console.WriteLine("You are {0} years old", result);

        }

        else

        {

        Console.WriteLine("Please enter valid age");

        }

    }

}