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68 lines
1.8 KiB
Plaintext
68 lines
1.8 KiB
Plaintext
NAME
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sleep - suspend operation for a specified time
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SYNOPSIS
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sleep([n])
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TYPES
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n non-negative real, defaults to 1
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return integer or null value
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DESCRIPTION
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This uses the C-library sleep (if n is integral) or usleep (for
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non-integral n) to suspend operation for n seconds. If n is an
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integer and the sleep is stopped by an interruption, the number
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of seconds remaining is returned.
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One kind of use is to slow down output to permit easier reading of
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results, as in:
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; for (i = 0; i < 100; i++) {
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;; print sqrt(i);
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;; sleep(1/2);
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;; }
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The following illustrates what happens if ctrl-C is hit 5 seconds
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after the first command:
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; print sleep(20)
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[Abort level 1]
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15
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EXAMPLE
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; sleep(1/3);
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; sleep(20);
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LIBRARY
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none
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SEE ALSO
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none
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## Copyright (C) 2000-2006 Ernest Bowen
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##
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## Calc is open software; you can redistribute it and/or modify it under
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## the terms of the version 2.1 of the GNU Lesser General Public License
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## as published by the Free Software Foundation.
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##
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## Calc is distributed in the hope that it will be useful, but WITHOUT
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## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
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## Public License for more details.
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##
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## A copy of version 2.1 of the GNU Lesser General Public License is
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## distributed with calc under the filename COPYING-LGPL. You should have
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## received a copy with calc; if not, write to Free Software Foundation, Inc.
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## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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##
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## @(#) $Revision: 30.1 $
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## @(#) $Id: sleep,v 30.1 2007/03/16 11:10:42 chongo Exp $
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## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/sleep,v $
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##
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## Under source code control: 2000/12/14 01:33:00
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## File existed as early as: 2000
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##
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## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
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