RE: Korn Shell and arithemetic

From: Lex de Haan <lex.de.haan_at_naturaljoin.nl>
Date: Wed, 23 Jun 2004 20:20:15 +0200
Message-ID: <JFEEIGBIDOCCDALDIPLNEEONCEAA.lex.de.haan@naturaljoin.nl>

Tim is using command substitution (with the ` characters) calling the bc command -- which is a brilliant programmable calculator on Unix, with unlimited precision.
see below:
[lex_at_node42]$ bc
bc 1.06
Copyright 1991-1994, 1997, 1998, 2000 Free Software Foundation, Inc. This is free software with ABSOLUTELY NO WARRANTY. For details type `warranty'.
1.2 > 1.0
1
quit
[lex_at_node42]$

Kind regards,
Lex.

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-----Original Message-----
From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org]On Behalf Of ryan.gaffuri_at_comcast.net
Sent: Wednesday, June 23, 2004 18:57
To: oracle-l_at_freelists.org
Subject: OT: Korn Shell and arithemetic

Tim,

what does this syntax mean?

    $ if [[ "`bc << __EOF__^J1.2 > 1.0^J__EOF__`" = "1" ]]
> then
> echo yes
> else echo no
> fi

    yes

    $ if [[ "`bc << __EOF__^J1.2 > 1.3^J__EOF__`" = "1" ]]
> then
> echo yes
> else echo no
> fi

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Received on Wed Jun 23 2004 - 13:17:11 CDT