Floating point minimum and maximum exponent values
Christian Heimes
christian at python.org
Tue Jul 16 08:46:36 EDT 2013
Am 16.07.2013 14:04, schrieb Chris Angelico:
> Piece of extreme oddity, this.
>
>>>> help(sys.float_info)
> .... lots of other info ...
> | max_exp
> | DBL_MAX_EXP -- maximum int e such that radix**(e-1) is representable
> |
> | min_exp
> | DBL_MIN_EXP -- minimum int e such that radix**(e-1) is a
> normalized float
> ....
>
> So it's technically correct. Followup question: Why is it off by one?
Because float.h defines DBL_MAX_EXP like that.
Why? I can't tell, too.
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