The OP didn't say sign function, he said sign of a number. In floating point numbers, every number including zero has a sign. -0 is a different number than 0. It's not a visual representation. It's used in underflows. n = 0 means 0 ≤ n < {smallest positive}. n = -0 means {smallest negative} < n ≤ 0

In reply to Re^5: Spaceship Zero by ikegami
in thread Spaceship Zero by Orchew

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