0是否positive?

0 is a Origin(原點)
It is not positive or negative.
(we don't have both positive and negative)

When the number is bigger then 0,the number is positive.
When the number is smaller then 0,the is negative.
And 0 is not bigger or small then 0,so it is a Origin.

其實你已掉進一個非正則負的思考陷阱.

An integer can be grouped under one of the three categories:
a. positive integers
b. zero
c. negative integers

So zero is neither positive nor negative.

Zero is neither +ve or -ve.

0唔係positive又唔係negative
細過0既就既negative, 大過0既就叫positive
0又大唔過自己, 又細唔過自己, 所以都唔係positive 同negative