[Chicago-talk] (no subject)

Sean Blanton sean at blanton.com
Mon May 7 10:16:21 PDT 2012

Yes, I'm late to the party on this. Certain types of rounding are
required in financial transactions and printf would be WRONG in the
last one I did. Printf has one type of rounding and it is only correct
if that is the type of rounding you need. Choosing a specific rounding
method can also prevent biases from arising in certain statistical
samples (if your numbers tend to end in an even digit for example).  I
suggest the obvious reference:


Math::Round is great. FYI, SQL Server has poor rounding functionality,
so do it in Perl!

I actually had to unround numbers recently. It's possible if you know
the original # is a multiple of 1/16 or 1/32 ;)


On Sat, Apr 28, 2012 at 9:06 PM, Andy Lester <andy at petdance.com> wrote:
> On Apr 28, 2012, at 3:27 PM, David Mertens wrote:
> On Sat, Apr 28, 2012 at 3:14 PM, Alexander
> Danel <danel at speakeasy.net> wrote:
>> The correct way to round numbers in Perl is "printf()" and "sprintf()".
> perldoc -q round
> perldoc -q says "Search the FAQ".
> xoa
> --
> Andy Lester => andy at petdance.com => www.petdance.com => AIM:petdance
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