Question

e=1/0!+1/1!+1/2!+1/3！……

I wrote the code like that, but whatever I input, it just returns 2….
Could you help me with that?

 (define (fact n)
        (if (= n 0)
            1
            (* n (- n 1))))

    (define (e limit)
            (if (= limit 0)
                1
                (+ (/ 1 (fact limit))  (e (- limit 1)))))

Answer 1

There’s a mistake in the fact procedure:

(define (fact n)
  (if (= n 0)
      1
      (* n (fact (- n 1))))) ; you forgot to recursively call `fact`

Test each procedure throughly, a simple unit test would have revealed that the problem was in fact and not in the e procedure.