[olug] Doing math in /bin/bash

[jay swackhamer]

You could use the 'basic calculator' 'bc' or expr

COUNT=0
COUNT=`expr ${A} \* ${C}`
COUNT=`${COUNT} / ${B}`


or

echo "${A} * ${C} / ${B}" | bc




On Sat, May 7, 2011 at 9:48 AM, Kevin D. Snodgrass <kdsnodgrass at yahoo.com>wrote:

> I'm trying to do a calculation in a bash script.  Looked at dc, but looks
> more complicated than it's worth.  Then tried gcalctool.  I get exactly what
> I want except for one thing, I just need the "whole" number part.  I.e.,
> (a/b)*c mod 1.
>
> Tried:
> declare -i COUNT
> COUNT=`gcalctool -s $A*$C/$B`
>
> Was hoping it could be that easy. :-)
>
>
> Any nifty ideas?
>
> Kevin D. Snodgrass
>
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