Re: Round() behaviour issue

On Tue, Dec 16, 2003 at 11:13:25AM +0000, Scott McDaid wrote: : : Hi there. I've been looking at the behaviour of the round functionality in : PHP. We're currently still using v4.2.3, (but the documentation seems to : suggest it's the same for versions after this). : : Doing the following rounds always rounds *up* to the nearest whole number. : i.e. : : 0.5 => 1 : 1.5 => 2 : 2.5 => 3 : 3.5 => 4 Any non-zero fractional component that gets rounded to the next whole number is done with ceil(). : In earlier PHP docs, it stated that halves would be rounded to the nearest : even number. : i.e. : : 3.5 => 4 : 4.5 => 4 I recall seeing those docs and getting very confused, especially with your listed example. Personally, I think the current behavior for round() is mathematically correct; i.e. any number whose fractional component is greater-than or equal-to 1/2 is rounded up to the next whole number, otherwise it's rounded down.