Exercise 2.15 of FutureLearn class on Erlang

ex2_15.erl

-module(ex2_15).
-export([prod/1, prod_tail/1, maxx/1, max_tail/1]).

prod([]) -> 1;
prod([X|Xs]) -> X * prod(Xs).

prod_tail(X) -> prod_tail(X, 1).

prod_tail([], P) -> P;
prod_tail([X|Xs], P) -> prod_tail(Xs, X * P).

maxx([S]) -> S;
maxx([X|Xs]) -> max(X, maxx(Xs)).

max_tail([X|Xs]) -> max_tail(Xs, X).
max_tail([], M) -> M;
max_tail([X|Xs], M) -> max_tail(Xs, max(X, M)).

I'm not sure this code will even compile. I see a function maxx/2 used in line 13 while it's not defined anywhere. Maybe you wanted to use max/2 instead?

Hi @elbrujohalcon, you are absolutely right. I wanted to use max library function. Thanks for the feedback.