_logb

Extracts an exponential value of a double-precision floating-point argument.

double _logb(
   double x 
);

Parameters

• 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.

Requirements

For more compatibility information, see Compatibility in the Introduction.

Libraries

All versions of the C run-time libraries.

.NET Framework Equivalent

Not applicable. To call the standard C function, use PInvoke. For more information, see Platform Invoke Examples.

See Also

Reference

Floating-Point Support

frexp