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Welcome to the Factorial in Elixir page! Here, you’ll find the source code for this program as well as a description of how the program works.
defmodule Factorial do def main(args) do args |> List.first |> as_integer |> get |> IO.puts() end def get(0, acc) do acc end def get(n, acc) do get(n - 1, acc * n) end def get(n) when not is_integer(n) or n < 0 do "Usage: please input a non-negative integer" end def get(n) do get(n, 1) end def as_integer(n) do try do String.to_integer(n) rescue ArgumentError -> -1 end end end Factorial.main(System.argv())
Factorial in Elixir was written by:
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Note: The solution shown above is the current solution in the Sample Programs repository as of Oct 16 2019 14:19:14. The solution was first committed on Oct 12 2019 09:32:34. As a result, documentation below may be outdated.
No ‘How to Implement the Solution’ section available. Please consider contributing.
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