Question about floating point
Frank Millman
frank at chagford.com
Tue Aug 28 10:11:35 EDT 2018
Hi all
I know about this gotcha -
>>> x = 1.1 + 2.2
>>> x
3.3000000000000003
According to the docs, the reason is that "numbers like 1.1 and 2.2 do not
have exact representations in binary floating point."
So when I do this -
>>> y = 3.3
>>> y
3.3
what exactly is happening? What is 'y' at this point?
Or if I do this -
>>> z = (1.1 + 2.2) * 10 / 10
>>> z
3.3
What makes it different from the first example?
Thanks
Frank Millman
More information about the Python-list
mailing list