Question

I am trying to implement a function which when called return a factorial of numbers in list. For example (fact ‘(2 4 3)) => (2 24 6) but mine is not working. I am pretty sure that the logic is correct for my implementation just I can not find my syntax error. So if you could have a look and give some feedback it would be great here is the code:

(defun fact (list)
    (cond ((null list) 0)
        ((zerop (first list) 1))
        (* first list(fact (rest list)))    
        ))

Answer 1

What you appear to be trying to do is apply a factorial function to each member of a list and collect the results in a list.

For this you need a factorial function and mapcar.