_scalb
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The latest version of this topic can be found at _scalb.
Scales argument by a power of 2.
double _scalb( double x, long exp );
Parameters
x
Double-precision, floating-point value.
exp
Long integer exponent.
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.
For more information about this and other return codes, see _doserrno, errno, _sys_errlist, and _sys_nerr.
The _scalb function calculates the value of x * 2exp.
| Routine | Required header |
|---|---|
_scalb | <float.h> |
For more compatibility information, see Compatibility in the Introduction.
Not applicable. To call the standard C function, use PInvoke. For more information, see Platform Invoke Examples.