_scalb
The latest version of this topic can be found at _scalb.
Scales argument by a power of 2.
Syntax
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.
For more information about this and other return codes, see _doserrno, errno, _sys_errlist, and _sys_nerr.
Remarks
The _scalb function calculates the value of x * 2exp.
Requirements
| Routine | Required header |
|---|---|
_scalb |
<float.h> |
For more compatibility information, see Compatibility in the Introduction.
.NET Framework Equivalent
Not applicable. To call the standard C function, use PInvoke. For more information, see Platform Invoke Examples.