Tips for golfing in Erlang

Question

Does anybody have tips for golfing in Erlang? I'm looking for specific things that can be applied to Erlang, not any language. I know we already have tips for Elixir, but that is different.

As usual, please post separate tips in separate answers.

Answer 1

Use the ending conditions

Suppose you have a function reversing a list:

r([H|T])->[T]++r(H);r([])->[].

Since this is the only condition left, this can be golfed into:

r([H|T])->r(T)++[H];r(_)->[].

Or, since this is an identity function:

r([H|T])->r(T)++[H];r(I)->I.

You can also abuse the wild-cards in if statements. E.g.

if A<B->A;true->B end.

This can be golfed into:

if A<B->A;_->B end.