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(...)


Solution
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));
    }
}

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