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Full Discussion: Generate random number
Top Forums Programming Generate random number Post 302421748 by luoluo on Sunday 16th of May 2010 01:47:24 AM
Old 05-16-2010
Generate random number

I saw this formula to generate random number between two specified values in shell script.the following.

$(((RANDOM%(max-min+divisibleBy))/divisibleBy*divisibleBy+min))

Give a example in book.
Generate random number between 6 and 30.like this.

$(((RANDOM%30/3+1)*3))

But I have a question , how to get a divisibleBy number is ok.
 

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RANDOM(3P)						     POSIX Programmer's Manual							RANDOM(3P)

PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the correspond- ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux. NAME
random -- generate pseudo-random number SYNOPSIS
#include <stdlib.h> long random(void); DESCRIPTION
Refer to initstate(). COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2013 Edition, Standard for Information Technol- ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, Copyright (C) 2013 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Stan- dard is the referee document. The original Standard can be obtained online at http://www.unix.org/online.html . Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html . IEEE
/The Open Group 2013 RANDOM(3P)
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