Strange behaviour with numbers in exponential notation

[Christian Gollwitzer]

Am 02.09.16 um 17:51 schrieb Marco Sulla:
>>>> 10**26 - 1
> 99999999999999999999999999
>>>> 1e26 - 1
> 1e+26
>

10**26 is computed with integer arithmetics. Python has bigints (i.e. as 
big as the memory allows)

1e26 denotes a *floating point number* Floating point has finite 
precision, in CPython it is a 64bit IEEE number. The largest exact 
integer there is 2**53 (~10^16), everything beyond cannot be accurately 
represented.

	Christian