sleep seconds => nil
Arguments and Values:
seconds---a non-negative real.
Causes execution to cease and become dormant for approximately the seconds of real time indicated by seconds, whereupon execution is resumed.
(sleep 1) => NIL ;; Actually, since SLEEP is permitted to use approximate timing, ;; this might not always yield true, but it will often enough that ;; we felt it to be a productive example of the intent. (let ((then (get-universal-time)) (now (progn (sleep 10) (get-universal-time)))) (>= (- now then) 10)) => true
Causes processing to pause.
The granularity of the scheduler.
Should signal an error of type type-error if seconds is not a non-negative real.
See Also: None.