Gnizmo on 17 May 2008
| Sqrl said: @math argument, I'm beyond certain that there is no defined rounding practice, it all depends on the rounder and what they want to achieve. There are three types of rounding: 1) To the nearest multiple of 'n', 2) Rounding down to a multiple of 'n', and 3) Rounding up to a multiple of 'n'. Normally 'n' is 1 but it can be 0.5 or any other rational number honestly. As far as I know the only thing you can't choose to do when rounding is round to an irrational number ...well I suppose you could manually but I don't know how you would go about figuring out a formula for it. |
There are a few different defined rounding practices, but none of the are considered the "official" way to round. This is a clear cut case of just truncating the numbers (or rounding down on everything) and moving on. Irrational numbers are rounded all the time though. It is really the only way to make them workable in math equations. If I had to keep Pi accurate to even a few thousand decimal places whnever I used it then I would still be working on my first Trig test I imagine. For irrational numbers you find a spot that is good enough and go from there. So long as you chose a number far enough out that it does not introduce a high level of inaccuracy to the equation it does not matter.
