This is the exact opposite to ruby, which uses `0..n` as inclusive, and `0...n` as exclusive

http://stackoverflow.com/questions/9690801/difference-betwee...

I always remembered it as "the third dot makes it bigger so it pushes the range and the last item falls off". I can't remember where that came from, perhaps related to the poignant guide:

http://poignant.guide/book/chapter-3.html#section2

I actually find in practice the swift ranges are the only ones I can reliably use without having to stop and look up the reference syntax every time.

For some reason, for me, `0..<n` reads as "0 through less than n" which signals to my brain a clear signal of an exclusive range.

Then I can work from there and if it doesn't have the < symbol it must be exclusive.

I suspect `0..=n` would work similarly well, but I've not seen a real language to ever do that yet