The fizzbuzz problem

The fizzbuzz problem takes it name from a game where the players take turns, going clockwise in a circle, counting upwards from 1: that is, 1, 2, 3, etc.

Except that there are three rules:

• If the number is divisble by 3, you say “fizz” instead of the number.
  • For example, 1, 2, fizz, 4, …
• If the number is divisible by 5, you say “buzz” instead of the number.
  • For example, 1, 2, fizz, 4, buzz, fizz, 7…
• If the number is divisible by both 3 and 5, you say “fizzbuzz” instead of the number.
  • For example, … 13, 14, fizzbuzz, 16, …

Recast as a programming problem, fizzbuzz goes like this:

Write a function that takes an single integer parameter, and returns a string. The parameter x is an integer greater than or equal to 1. The return value should be either the number x formatted as a string, or the word “fizz”, “buzz”, or “fizzbuzz” as appropriate.

For example:

• fizzbuzz(1) should return "1"
• fizzbuzz(2) should return "2"
• fizzbuzz(3) should return "fizz"
• fizzbuzz(4) should return "4"
• fizzbuzz(5) should return "buzz"
• fizzbuzz(6) should return "fizz"
• fizzbuzz(7) should return "7"
• …
• fizzbuzz(15) should return "fizzbuzz"