Iteration in Common Lisp

iter.lisp

;;;;;; iteration in common lisp


;;;; do
;; `do` is like `if` in c

(do ((x 1 (+ x 1))
     (y 1 (* y 2)))
    ((> x 5) y)  ;; when x is bigger than 5, return y
  (print y)
  (print 'working))

;;; output
;; 1
;; WORKING
;; 2
;; WORKING
;; 4
;; WORKING
;; 8
;; WORKING
;; 16
;; WORKING
;;; return value
;; 32


;;;; dotimes
;; `dotimes` is like `range` or `range` in python

(let ((x 1))
  (dotimes (num 10)
    (setq x (* x 2)))
  (print x))

;;; output
;; 1024
;;; return value
;; T

(print (dotimes (num 10 (+ num 5))))

;;; output
;; 15
;;; return value
;; T


;;;; dolist
;; `dolist` is like `foreach` in java

(dolist (x '(1 2 3))
  (print x))

;;; output
;; 1
;; 2
;; 3
;;; return value
;; T


;;;;;; `loop` is more powerful for iteration