is 0 negative or positive?
Actually, 0 (Zero) is neither a negative or a positive number.
The whole idea of positive and negative is defined in terms of zero.
Negative numbers are numbers that are smaller than zero, and positive numbers
are numbers that are bigger than zero.
Since zero isn't bigger or smaller than itself (just like you're not older than
yourself, or taller than yourself :p), Zero is neither positive nor negative.