The goal of Fizzbuzz is to introduce you to Test Driven Development (TDD) and Pair Programming.

Fizzbuzz is a simple coding challenge, often described as a code kata. The objective of Fizzbuzz is to create a program with the following specification:

• The program can be passed a number.
• When passed a number that is a multiple of 3, the program returns the message 'Fizz'.
• When passed a number that is a multiple of 5, the program returns the message 'Buzz'.
• When passed a number that is a multiple of both 3 and 5, the program ignores the previous 2 rules and returns the message 'Fizzbuzz'.
• In all other cases, the program simply returns the given number.