Exercise 1.31 Higher-order procedures
OmarEP

Code Review

Compare your solutions
    #| BEGIN (Write your solution here) |#
(define (product term a next b)
  (if (> a b)
      1
      (* (term a)
         (product term (next a) next b))))

(define (factorial n)
  (product identity 1 inc n))
#| END |#

    #| BEGIN (Write your solution here) |#
(define (product term a next b)
  (define (iter a result)
    (if (> a b)
        result
        (iter (next a) (* (term a) result))))
  (iter a 1))

(define (factorial n)
  (product identity 1 inc n))
#| END |#

    #| BEGIN (Write your solution here) |#
(define (product term a next b)
  (if (> a b)
      1
      (* (term a)
         (product term (next a) next b))))

(define (factorial n)
  (product identity 1 inc n))
#| END |#

    #| BEGIN (Write your solution here) |#
(define (product term a next b)
  (define (iter a result)
    (if (> a b)
        result
        (iter (next a) (* (term a) result))))
  (iter a 1))

(define (factorial n)
  (product identity 1 inc n))
#| END |#