Floating point minimum and maximum exponent values
Serhiy Storchaka
storchaka at gmail.com
Tue Jul 16 13:21:30 EDT 2013
16.07.13 15:04, Chris Angelico написав(ла):
> 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?
sys.float_info.max == sys.float_info.radix**sys.float_info.max_exp -
sys.float_info.radix**(sys.float_info.max_exp-sys.float_info.mant_dig)
More information about the Python-list
mailing list