• return [result]

• 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

None.

None.

• Special Operator BLOCK
• Special Operator RETURN-FROM
• {\secref\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.