newb: Python Floating Point

[johnny]

When I do the following, rounding to 2 decimal places doesn't seem to
work. I should get 0.99 :

thank you.

 

[Robert Kern]

When I do the following, rounding to 2 decimal places doesn't seem to
work. I should get 0.99 :

0.98999999999999999

http://docs.python.org/tut/node16.html

--
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
that is made terrible by our own mad attempt to interpret it as though it had
an underlying truth."
-- Umberto Eco

 

[Dan Bishop]

When I do the following, rounding to 2 decimal places doesn't seem to
work. I should get 0.99 :

In binary, 0.99 is the recurring fraction 0.11 11110101110000101000
11110101110000101000 11110101110000101000 .... Thus, it can't be
exactly represented as a float.