Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!systech!dan
From: dan@systech.bjorn.COM (Dan Gill)
Newsgroups: comp.unix.questions
Subject: Re: Bourne shell question
Summary: try expr
Message-ID: <907@systech.bjorn.COM>
Date: 12 May 91 04:31:29 GMT
References: <1991May8.192623.24160@bnlux1.bnl.gov>
Organization: Systech Corp., San Diego, CA
Lines: 29

In article <1991May8.192623.24160@bnlux1.bnl.gov>, abrams@dan.ccd.bnl.gov (The Ancient Programmer) writes:
> 
> 	How does one do a simple computation in a shell script?
> The c-shell does it very neatly. 
> Running:
> 	#!/bin/csh
> 	set a = 10
> 	set b = 1
> 	@ c = $a - $b
> 	echo "a=$a, b=$b, c=$c"
> 
> produces: a=10, b=1, c=9
> 
you will have to do the math outside of the shell script with expr

try this:
a=10
b=1
c=`expr $a - $b`
echo "a=$a, b=$b, c=$c"

unless you don't have expr then you are back where you started...

Dg
-- 
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"On second thought, let us not go to Camelot.  It is a silly place"
Dan Gill                                          uunet!systech!dan
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