SBCL

• manual

--script

;; filename.lisp
(print "hello world")

$ sbcl --script filename.lisp
"hello world"
$

--load

;; filename.lisp
(defun sum (list)
  (if list (+ (car list) (sum (cdr list))) 0))

$ sbcl --load filename.lisp
#<some preamble about sbcl you can ignore>
* (sum '(1 2 3 4 5))
15