Important This document may not represent best practices for current development, links to downloads and other resources may no longer be valid. Current recommended version can be found here. ArchiveDisclaimer


Returns next representable neighbor.

double _nextafter(
   double x,
   double y 


x, y
Double-precision floating-point values.

Return Value

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.


Routine Required header Compatibility
_nextafter <float.h> Win 98, Win Me, Win NT, Win 2000, Win XP

For additional compatibility information, see Compatibility in the Introduction.


All versions of the C run-time libraries.

See Also

Floating-Point Support Routines | _isnan | Run-Time Routines and .NET Framework Equivalents

© 2016 Microsoft