After reading your article on Rounding, I see that you do not have much information regarding the floor function. I've been working with it on my own for a few years and recently I decided to compile my collective knowledge into one document. I would like to propose that the math wikia add some of the floor function information to the wikia. It's reasonably easy to understand (at least, in my opinion). I know it isn't really filled out too much, but let me know what you all think.
-The Great Duck