[Date Prev][Date Next][Thread Prev][Thread Next]
[Date Index]
[Thread Index]
- Subject: Re: Lua minus null (-0)
- From: Dirk Laurie <dpl@...>
- Date: Sun, 5 Jun 2011 13:31:45 +0200
On Sun, Jun 05, 2011 at 12:47:39PM +0200, Sebastian wrote:
> I have found an interesting bug. if you run
>
> a = 0
> b = -0
> if (a == b) then
> print("0 is -0!")
> end
>
> in the lua demo (http://www.lua.org/cgi-bin/demo), then you see that lua
> does'nt make a difference between 0 and -0.
This is not a Lua bug. It is not any kind of bug. It is defined this
way in the IEEE 754 floating-point standard:
http://en.wikipedia.org/wiki/Negative_zero
Dirk
