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return
[result] => #<NoValue>
result—a form; evaluated. The default is nil.
Returns, as if by return-from, from the block named nil.
(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
block , return-from , Evaluation
(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.