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xavvvier/tail-recursive-factorial.exs

Last active March 15, 2019 09:05
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tail-recursive-factorial.exs
defmodule Factorial do
def of(number) do
of(number, 1)
end
defp of(n, product) when n<= 1 do
product
end
defp of(number, product) do
of(number-1, product * number)
end
end
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