using System;

public class MthTest {

public static void Main() {

double i;

Console.WriteLine("Please enter your number \n");

i = Convert.ToDouble(Console.ReadLine());

Console.WriteLine("The square root of {0} is {1}\n", i, Math.Sqrt(i));

Console.WriteLine("The value of Pi number is {0} \n", Math.PI);

Console.WriteLine("The square of {0} is {1}\n", i, Math.Pow(i,2));

Console.ReadLine(); }

}