return

(return [value])

Performs a non-local exit from the nearest enclosing loop (do, dolist, dotimes, or loop), causing that loop form to evaluate to value (or nil if omitted). The value is evaluated before the exit. Because it targets the innermost loop boundary, return is only valid inside such a loop; it works where the surrounding operand stack is empty, such as a when/if branch or a loop-body statement.