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Held: Monday, March 1, 2010
Summary: We consider why and how you name values within a procedure. We also consider why and how you limit access to those names to within the procedure.
lethas the form
(let ((name1 exp1) (name2 exp2) ... (namen expn)) body)
lethas the meaning:
letin a simple expression:
(define values (list 1 4 2 4 1 5 9)) (let ((largest (max values)) (smallest (min values))) (/ (+ largest smallest) 2))
letwithin a procedure.
let*has the form
(let* ((name1 exp1) (name2 exp2) ... (namen expn)) body)
let*has the meaning:
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