Dirk Van de moortel wrote:
By the way, zero is usually taken to be both positive and
negative.

Hahahahahahahahahahahahahahahahahahahahahahahahaha hahahahahahahaha!
And you expect to teach OTHERS?!

The IEEE Floating-Point Arithmetic Standard (IEEE 754) defines zero
representions as positive zero and negative zero. Just about every CPU on
the planet uses this standard. If zero is not positive or negative, then
what do you figure it is?