Numerics, NaNs, IEEE 754 and C99
grante at visi.com
Wed Jun 14 19:29:52 CEST 2006
On 2006-06-14, Christophe <chris.cavalaria at free.fr> wrote:
>>>>The division by zero trap is really annoying. In my world the
>>>>right thing to do is to return Inf.
>>>Your world is flawed then, this is a big mistake. NaN is the
>>>only aceptable return value for a division by zero.
>> You're probably right if you're talking about math, but I'm not
>> doing math. I'm doing engineering. In all of the situations
>> I've ever encountered, Inf was a much better choice.
> You should have been more precise then : "In my ideal world, when
> dividing a non zero value by a zero value, the result should be +Inf or
> -Inf according the the sign rules"
True. I've been dealing with IEEE 754 so long that I assume
things like that go without saying.
> On that point, you should also note that +0 and -0 are sometimes
> considered two different floating point numbers in Python :)
Different but equal.
[Don't tell the Supreme Court.]
Grant Edwards grante Yow! I just had a NOSE
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