In Lisp, how many inputs can the + function actually have?

Question

I\'m relatively new to Lisp, and I was wondering if there really is an upper limit to the \"+\" function.

(I guess this applies to all the other arithmetic function

Answer 1

Clojure provides an example of a Lisp where you can actually have an infinite number of arguments to a function, via the use of lazy sequences:

; infinite lazy sequence of natural numbers
(def naturals (iterate inc 1))

(take 10 naturals)
=> (1 2 3 4 5 6 7 8 9 10)

; add up all the natural numbers 
(apply + naturals)
=> ...... [doesn't terminate]

Not particularly useful, of course.....