- (define-values <formals> <expression>)syntax
It is an error if a variable appears more than once in the set of <formals>.
Semantics: <Expression> is evaluated, and the <formals> are bound to the return values in the same way that the <formals> in a lambda expression are matched to the arguments in a procedure call.
(define-values (x y) (exact-integer-sqrt 17)) (list x y) ==> (4 1) (let () (define-values (x y) (values 1 2)) (+ x y)) ==> 3