atom    = atom                        % atom another = another                     % another atom    = another                     % exception error

Var = 2.                              % 2 Var = 3 - 1.                          % 2 Var = 1.                              % exception error

Attr = {name, sloger}.                % {name, sloger} {name, Name} = Attr.                  % {name, sloger} Name.                                 % sloger

Langs = [perl, python, ruby, erlang]. [Head | Tail] = Langs. Head.                                 % perl Tail.                                 % [python, ruby, erlang]

sum([]) -> 0; sum([H|T]) -> H + sum(T). sum([1, 2, 3]).                       % 6

%% record(post, {title, slug, body, author}). Post = #post{title = "Pattern Match in Erlang",              slug = "pattern-match-in-erlang",              body = "Bla bla bla...",              author = sloger}. #post{title = Title, slug = Slug} = Post. Title.                                % "Erlang 中的模式匹配总结" Slug.                                 % "summary-of-pattern-match-in-erlang"

Red = 5. Green = 23. Blue = 200. Color = <<Red:5, Green:6, Blue:5>>. <<R1:5, G1:6, B1:5>> = Color. R1.                                   % 5 G1.                                   % 23 B1.                                   % 200

if     Pattern1 [when Guard1] -> Expression1;     Pattern2 [when Guard2] -> Expression2;     %% and so on ...     _                      -> Expression3           % 匹配所有其它结果 end.

case Expression of     Pattern1 [when Guard1] -> Expression1;     Pattern2 [when Guard2] -> Expression2;     %% and so on ...     _                      -> Expression3 end.

try FunctionOrExpressions of     Pattern1 [when Guard1] -> Expression1;     Pattern2 [when Guard2] -> Expression2     %% and so on ... catch     ExType:ExPattern1 [when ExGuard1] ->         ExExpression1;     ExType:ExPattern2 [when ExGuard2] ->         ExExpression2;     %% and so on ...     _:_ -> DefaultExExpression               % _:_ 匹配所有异常 after     AfterExpressions end

loop() ->     receive         {From, {rectangle, Width, Height}} ->             From ! {self(), Width * Height},             loop();         {From, {circle, R}} ->             From ! {self(), 3.14 * R * R},             loop();         {From, _Other} ->             From ! {self(), {error, unknown_shape}}             loop()     end. Pid = spawn(fun loop/0). Pid ! {self(), {rectangle, 10, 5}}.         % {Pid, 50} Pid ! {self(), {circle, 4}}.                % {Pid, 50.24} Pid ! {self(), {square, 10}}.               % {Pid, {error, unknown_shape}}