main.rkt

(define (foo x)
    (let ((x 3)
    (y (+ x 2))); uses outer x here
    (* x y))
)

(print (foo 2)); prints 12
(display "\n")

(define (bar x)
  (+ (let ((x 3))
  (+ x (* x 10)))
     x); outer x here
)

(print (bar 5)) ; prints 38