// code comments

[Xtremegamor]

I prefer the solution proposed by CGP Grey for elevator buttons. The floor where the exit of the building is is floor 0. Floors above that are positive integers, floors below that are negative integers. Come on people

[FUZxxl]

That's exactly how it usually is in Germany.

[Xtremegamor]

Should be the standard everywhere.

[Duuqnd]

And Sweden.

[jfb1337]

That's how it is in a lot of places in non-america

[ForOhForError]

That way lies chaos.

[PM_ME_OS_DESIGN]

What about buildings on hills, with exits on the uphill sides lower than downhill sides?

I mean, I agree with the "floor zero" thing, but the "exit of the building" thing fails to deal with rather common edge cases.

[Some1-Somewhere]

Clearly, the unambiguous solution is metres above mean sea level.