| Value | Meaning |
|---|---|
| signalingNaN | a signalling NaN represents most of the time an uninitialized variable; a quiet NaN represents the result of an invalid operation |
| quietNaN | ditto |
| negativeInfinity | value represents infinity |
| positiveInfinity | ditto |
| negativeNormal | value represents a normalized _decimal value |
| positiveNormal | ditto |
| negativeSubnormal | value represents a subnormal _decimal value |
| positiveSubnormal | ditto |
| negativeZero | value is 0 |
| positiveZero | ditto |
IEEE-754-2008 floating point categories