using System;

public class Program

{

    public static void Main()

    {

        string choice = "yabab";

while(choice != "q" && choice != "Q")

{

Console.Clear();

Console.WriteLine("How many square roots would you like to calculate?");

string input = Console.ReadLine();

double output;

if(double.TryParse(input, out output))

{

    double i = 1;

 if(output<=0)

 { 

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

  Console.WriteLine("");

}

​

do

{

    double r = Math.Sqrt(i);

Console.WriteLine("√"+i+ " is "+ r.ToString("##.###") + ". ");

i++;

}

while(i<=output);

}

else

{

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

}

Console.WriteLine("");

Console.WriteLine("Press q to quit the program or press anything else to restart.");

choice = Console.ReadLine();

}

}

}