round off

[W. Vanweersch]

Hello,

The following looks strange to me in Python:
7/-3 gives -3

It looks like Python rounds off -2.33333 to -3! is this correct??
Isn't it -2?




Greets,



Wim.

[John Baxter]

Re: round off

In article <mailman.441.10 67976033.702.py thon-list@python.org >,
"W. Vanweersch" <n.vanweersch@h ccnet.nl> wrote:
[color=blue]
> Hello,
>
> The following looks strange to me in Python:
> 7/-3 gives -3
>
> It looks like Python rounds off -2.33333 to -3! is this correct??
> Isn't it -2?[/color]

If you like, but not here. (It's really truncation, not rounding.)


It can be unexpected. It keeps this sort of thing working:
[color=blue][color=green][color=darkred]
>>> (-7 / 3)* 3 + (-7 % 3)[/color][/color][/color]
-7

Truncate / toward - infinity. If it truncated toward zero, then you
have to mess with the sign of the result of %, and other odd things
happen.

--John

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