using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Please enter a positive integer");

        string sans = Console.ReadLine();

        ulong ans;

        if(ulong.TryParse(sans, out ans))

        {for (ulong i=1; i<=10; i++)

        {Console.Write(ans*i + " ");

        }

        }

        else

        Console.WriteLine("Please enter a valid number");

    }

}

​