_logb
Visual Studio .NET 2003
Extracts exponential value of double-precision floating-point argument.
double _logb( double x );
Parameter
- x
- Double-precision floating-point value.
Return Value
_logb returns the unbiased exponential value of x.
Remarks
The _logb function extracts the exponential value of its double-precision floating-point argument x, as though x were represented with infinite range. If the argument x is denormalized, it is treated as if it were normalized.
| Input | SEH Exception | Matherr Exception |
|---|---|---|
| ± QNAN,IND | None | _DOMAIN |
| ± 0 | ZERODIVIDE | _SING |
Requirements
| Routine | Required header | Compatibility |
|---|---|---|
| _logb | <float.h> | Win 98, Win Me, Win NT, Win 2000, Win XP |
For additional compatibility information, see Compatibility in the Introduction.
Libraries
All versions of the C run-time libraries.
See Also
Floating-Point Support Routines | frexp | Run-Time Routines and .NET Framework Equivalents
