10,000 factorial in lisp

And now, in lisp, courtesy of the delightfully-named Sam Vevang:

(define (fact a b) ; where a is 1 and b is 10000
  (define (iter a result)
    (if (> a b)
        result
        (iter (+ a 1) (* result a))))
  (iter a 1))

Sam tells me that when he runs this on the STK scheme interpreter, it gives the same result I got.

Man, I really need a commenting system, don’t I? :-(