using System;

public class Program

{

    public static void Main()

    {

        string restart = "Y";

        while (restart != "q" || restart != "Q")

        {

        Console.WriteLine("Please enter the number of square roots you would like to calculate.");

        string x = Console.ReadLine();

        double n;

        if (double.TryParse(x, out n))

        {

            double i = 1;

            do

            {

                Console.WriteLine(" _");

                Console.WriteLine("√" + i + " = " + Math.Sqrt(i).ToString("##.###"));

                i++;

            }

            while (i <= n);

            if (n <= 0)

            {

                Console.Clear();

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

                restart = Console.ReadLine();

                Console.Clear();

            }

            else

            {

                Console.WriteLine();

                Console.WriteLine("Press q to quit or anything else to continue.");

                restart = Console.ReadLine();

                Console.Clear();    

            }

        }

    }

}

}