Returns the next representable neighbor.

double _nextafter( 
   double x, 
   double y  

x, y

Double-precision floating-point values.

If x=y, _nextafter returns x, with no exception triggered. If either x or y is a quiet NaN, then the return value is one or the other of the input NaNs.

The _nextafter function returns the closest representable neighbor of x in the direction toward y.


Required header



For more compatibility information, see Compatibility in the Introduction.


All versions of the C run-time libraries.

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