# 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(...)

## Source Code:

```
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));
}
}
```

Exercisey 3.11