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Full Discussion: mathematics in shell script
Top Forums UNIX for Dummies Questions & Answers mathematics in shell script Post 17934 by sureshy on Thursday 21st of March 2002 09:32:57 AM
Old 03-21-2002
mathematics in shell script

Hi Friends,

I am new to shell scripting and a trying to work this out.

I have a variable called $number.
The value in this variable is 10

I want to display $number - 2 in a mail. The result would be 8

eg.

mail -s 'subject' user <<eof
the result of your calculation is $number - 2
eof

I should be mailed :
the result of your calculation is 8

can someone please give me the syntax.

likewise, I would like to know how to do it with echo

echo $number -2

8

Thanks in advance

Suresh
 

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biff(1B)					     SunOS/BSD Compatibility Package Commands						  biff(1B)

NAME
biff - give notice of incoming mail messages SYNOPSIS
/usr/ucb/biff [y | n] DESCRIPTION
biff turns mail notification on or off for the terminal session. With no arguments, biff displays the current notification status for the terminal. If notification is allowed, the terminal rings the bell and displays the header and the first few lines of each arriving mail message. biff operates asynchronously. For synchronized notices, use the MAIL variable of sh(1) or the mail variable of csh(1). A `biff y' command can be included in your ~/.login or ~/.profile file for execution when you log in. OPTIONS
y Allow mail notification for the terminal. n Disable notification for the terminal. FILES
~/.login User's login file ~/.profile User's profile file ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWscpu | +-----------------------------+-----------------------------+ SEE ALSO
csh(1), mail(1), sh(1), attributes(5) SunOS 5.11 14 Sep 1992 biff(1B)
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