I'm having trouble coming up with a way of saying "not greater than 0" and "not less than 0".
Would the following sentences be natural/grammatical? If not, in what ways can the following be expressed?
greater than 0/less than 0
greater than or equal to 0/less than or equal to 0
not greater than 0/not less than 0
I thought that
以上 meant "above" and
以下 "below". If that's the case, is there any way to tell that usage and their usage as "greater/less than or equal" apart?