_scalb
Visual Studio .NET 2003
Scales argument by a power of 2.
double _scalb( double x, long exp );
Parameters
- x
- Double-precision, floating-point value.
- exp
- Long integer exponent.
Return Value
Returns an exponential value if successful. On overflow (depending on the sign of x), _scalb returns +/– HUGE_VAL; the errno variable is set to ERANGE.
See _doserrno, errno, _sys_errlist, and _sys_nerr for more information on this, and other, return codes.
Remarks
The _scalb function calculates the value of x * 2exp.
Requirements
| Routine | Required header | Compatibility |
|---|---|---|
| _scalb | <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 | ldexp | Run-Time Routines and .NET Framework Equivalents
