Sphere, float - Practice Exercises C# Sharp

Lesson 3:

Basic data types

Exercise 3.11:

Sphere, float

Objetive:

Calculate the surface and volume of a sphere, given its radius (surface = 4 * pi * radius squared; volume = 4/3 * pi * radius cubed).

Hint: for "float" numbers, you must use Convert.ToSingle(...)

using System;
public class Sphere
{
    public static void Main()
    {
        float radius;
        float pi = 3.1415926535f;

        Console.Write("Radius? ");
        radius = Convert.ToSingle(Console.ReadLine());

        Console.WriteLine(4 * pi * (radius * radius));

        Console.WriteLine(4 / 3 * pi * (radius * radius * radius));
    }
}