FizzBuzz Elixir

fizzbuzz.exs

fizzer = fn
  (0,0,_) -> "FizzBuzz"
  (0,_,_) -> "Fizz"
  (_,0,_) -> "Buzz"
  (_,_,n) -> n
end

fizzbuzz = fn(n) ->
  fizzer.(rem(n,3), rem(n,5), n)
end

output

iex(25)> fizzbuzz.(10)
"Buzz"
iex(26)> fizzbuzz.(11)
11
iex(27)> fizzbuzz.(12)
"Fizz"
iex(28)> fizzbuzz.(13)
13
iex(29)> fizzbuzz.(14)
14
iex(30)> fizzbuzz.(15)
"FizzBuzz"