common-lisp LOOP, a Common Lisp macro for iteration Simple LOOP form
Example
Simple LOOP form without special keywords:
(loop forms...)
To break out of the loop we can use (return <return value>) `
Some examples:
(loop (format t "Hello~%")) ; prints "Hello" forever
(loop (print (eval (read)))) ; your very own REPL
(loop (let ((r (read)))
(typecase r
(number (return (print (* r r))))
(otherwise (format t "Not a number!~%")))))
