#!/usr/bin/env newlisp

(setq L '(1 2 3))
(println (first L)) ; le premier élément
(println (rest L)) ; la liste privée du premier élément
(println (last L)) ; le dernier élément

(println (rest '(1)))
(println (rest '()))
; return an error: empty list
;(println (first '()))
;(println (last '()))

(define (list-length a-list)
  (if a-list
    (+ 1 (list-length (rest a-list)))
    0))

(println (list-length L))

(println (length L))

type list ::= empty-list | first * list

(setq x 1)
(println (+ x 1))

(set 'x 1 'y 2)
(let ((x 3) (y 4))
  (println x)
  (println (list x y)))
(println "x="x" y="y)

(setq x 3 y 4)
(let ((x 1) (y 2))
  (println "x="x" y="y))
(println "x="x" y="y)

(setq x 3 y 4)
(let ((y 2))
  (setq x 5 y 6)
  (println "x="x" y="y))
(println "x="x" y="y)

(exit)