Re: math.floor and rounding

[J.Jørgen von Bargen <jjvb.primus@...>]

James Graves <ansible <at> xnet.com> writes:

> If you want to _round_ off a floating point number, instead of
> flooring it, here is the rounding function I have in my standard
> library:
> 
>     function round(num) return math.floor(num+.5) end
:::
> Are you handling negative numbers?  math.floor may not be what you want
> in that case:

This is my way to get symmetric behavior

local function round(x)
	if x<0 then return -round(-x) end
	return  math.floor(x+0.5)
end

Test with -1.5 : my round=-2 your round=-1

Regards Jørgen