As I understand it, Erlang inherited its arity notation from Prolog (which early versions of Erlang were implemented in). https://en.m.wikipedia.org/wiki/Erlan

As I understand it, Erlang inherited its arity notation from Prolog (which early versions of Erlang were implemented in). https://en.m.wikipedia.org/wiki/Erlang_(programming_language)#History https://en.m.wikipedia.org/wiki/Erlang_(programming_language...