5 ms·

basically every language with IEEE-754[1] compliance..! [1] - https://en.m.wikipedia.org/wiki/IEEE_754 https://en.m.wikipedia.org/wiki/IEEE_754

• saagarjha 8y ago
  But only when imposing a total ordering.
  • foxhill 8y ago
    that’s not the case, in IEE754 floating point, zero is signed - i.e negative and positive zero are distinct values
    • saagarjha 8y ago
      But the standard comparison operators don’t distinguish them.
• bzbarsky 8y ago
  I'd think that in all those languages, -0 == +0 tests true, though. In JavaScript even -0 === +0 tests true. The only way to tell them apart in general is to divide by them. In some languages you might be able to type-pun and examine the bit pattern, or do things like Object.is() or whatnot.