_nextafter, _nextafterl

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Header File

float.h

Prototype

double _nextafter(double da, double db);
long double _nextafterl(long double lda, long double ldb);

Description

Takes two doubles (da and db) and returns the closest representable neighbor of da in the direction toward db.

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

_nextafterl is the long double version; it takes a long double argument and returns a long double result.

Return Value

Returns the closest representable neighbor of the first argument in the direction toward the second argument.

Portability

	POSIX	ANSI C	ANSI C++	Win32	Win64	OS X
_nextafter				+
_nextafterl				+