Does float have a negative zero? (-0f)

Question

IEEE floating point numbers have a bit assigned to indicate the sign, which means you can technically have different binary representations of zero (+0 and -0). Is there an

Answer 1

Yes, floats have negative zero just like other IEEE floating point types such as double (on systems with IEEE floating point). There is an example here in Octave of how to create them; the same operations work in C. The == operator treats +0 and -0 the same, though, and so negative zeros do not break that type of comparison.