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jasondown/factorial_elixir.ex

Created September 2, 2016 04:29
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Elixir Factorial - Pattern Matching and Recursion
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factorial_elixir.ex
defmodule MyMath do
def factorial(n), do: factorial(n, 1)
def factorial(0, acc), do: acc
def factorial(n, acc) do
factorial(n - 1, acc * n)
end
end
@jasondown
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Sample usage:
IO.inspect(for n <- 0..10, do: MyMath.factorial(n))

[1, 1, 2, 6, 24, 120, 720, 5040, 40320, 362880, 3628800]

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