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Date: Fri, 28 Nov 1997 15:16:37 -0500
From: Alain Caron <alainc@sangacorp.com>
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Subject: Re: strange arithmetic
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Louis-David Mitterrand wrote:

> (using 3.0.5)
>
> % i=0;while [[ $[++i] < 900 ]];do;echo $i;done
> % 1
> % 2
> [...]
> % 90
>
> 90 ?? I asked for 900 and it stops at 90. On the other hand the
> following:
>
> % i=0;while ! [[ $[++i] = 900 ]];do;echo $i;done
> % 1
> % 2
> [...]
> % 899
>
> Is this normal?
>
> --
>
>      Louis-David Mitterrand
>      http://www.aparima.com
>      mito@aparima.com

  This is, I presume, because ">" and "=" are doing a lexicographic
comparison.  For a numeric
comparison, use "-gt" and "-eq" operators.

Alain Caron
alainc@sangacorp.com