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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:
If you see anything you’d like to change or update, please consider contributing.
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 As a result, documentation below may be outdated.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.
No ‘How to Run the Solution’ section available. Please consider contributing.