Erlang operator precedence:

Operators                              Associativity
:
#
(unary) +, (unary) -, bnot, not
/, *, div, rem, band, and              Left associative
+, -, bor, bxor, bsl, bsr, or, xor     Left associative
++, --                                 Right associative
==, /=, =<, <, >=, >, =:=, =/=
andalso
orelse
=, !                                   Right associative
catch