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Subject: RE:  Doing additions in cygwin?
Date: Thu, 22 Mar 2007 15:15:00 -0500
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From: "Thrall, Bryan" <bryan DOT thrall AT flightsafety DOT com>
To: <cygwin AT cygwin DOT com>
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Kevin Markle wrote on Thursday, March 22, 2007 2:49 PM:
> Hello,
> 
> I'm attemping to use the expr variable and am having problems. when I
> type test=expr 1+1 or
> test=`expr 1+1` or
> test='expr 1 + 1' or
> 
> with and without quotes?? I just want to create a variable based on
> and expression?

(1) You didn't really describe what problems you're seeing (I think I
know what they are, though).

(2) expr wants separate arguments, like "expr 1 + 1", not "expr 1+1".

(3) use backtics to get the output when you set the variable:
"test=`expr 1 + 1`", not "test='expr 1 + 1'".

(4) This isn't really Cygwin-specific, so it would be better to try "man
expr" (for how to use expr) or "man bash" (for quoting rules).

Hope this helps!
-- 
Bryan Thrall
FlightSafety International
Bryan DOT Thrall AT flightsafety DOT com

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