main.erl

-module(main).
-export([take/2, take_test/0]).

-spec take(integer(), [T]) -> [T].
take(N, List) when N >= 0 -> take(N, List, []).

take(0, _List, Acc) -> Acc;
take(_N, [], Acc) -> Acc;
take(N, [X|Xs], Acc) -> take(N-1, Xs, Acc ++ [X]).

take_test() ->
  [] = take(0, [1]),
  [] = take(1, []),
  [1,2] = take(2, [1,2,3]),
  ok.