[PD] expr modulo negative

Andy Farnell padawan12 at obiwannabe.co.uk
Tue Oct 14 14:32:23 CEST 2008


[%] and [mod] treat the sign differently. [mod] is monotonic 
but [%] is symmetrical about zero.

On Tue, 14 Oct 2008 13:45:50 +0100
Hans Roels <hans.roels at versateladsl.be> wrote:

> Hello,
> 
> If you want to calculate the modulo of a negative number, you get a 
> different result if you use the 'mod' object or 'expr' with %.
> 
> -1  4
> |    |
> mod
> |
> 3
> 
> -1                 4
> |                   |
> expr $f1 % $f2
> |
> -1
> 
> I guess this is a bug in expr ?
> 
> Hans r
> 
> 
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