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Comment by zibzab

5 years ago

I have always wanted to ask this: Is zero a positive number? And do we always round up?

- Possible owner of a mildly successful $xT company.

Usage varies, there are a few notations for specifying whether the set of natural numbers/positive integers includes zero when it matters.

'Always round up' sounds more like the ceiling function (or ceil•abs) - usually rounding means to the nearest integer, or whatever we're rounding to.