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5.3.26 return [Macro]

return [result] => #<NoValue>

Arguments and Values::

result—a form; evaluated. The default is nil.

Description::

Returns, as if by return-from, from the block named nil.

Examples::
      (block nil (return) 1) =>  NIL
      (block nil (return 1) 2) =>  1
      (block nil (return (values 1 2)) 3) =>  1, 2
      (block nil (block alpha (return 1) 2)) =>  1
      (block alpha (block nil (return 1)) 2) =>  2
      (block nil (block nil (return 1) 2)) =>  1
See Also::

block , return-from , Evaluation

Notes::
      (return) == (return-from nil)
      (return form) == (return-from nil form)

The implicit blocks established by macros such as do are often named nil, so that return can be used to exit from such forms.