> Your visualization makes sense if you always count them going from left to right. Yes - personally, I do always count them left-to-right. I don't think nega

> Your visualization makes sense if you always count them going from left to right. Yes - personally, I do always count them left-to-right. I don't think negative indices implies counting right-to-left. A negative step does, but I never use one because IMO it doesn't make sense to have an exclusive LHS and inclusive RHS.