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FreeBSD 11.0 - man page for nexttowardl (freebsd section 3)

NEXTAFTER(3)						   BSD Library Functions Manual 					      NEXTAFTER(3)

NAME
nextafter, nextafterf, nextafterl, nexttoward, nexttowardf, nexttowardl -- next representable value
LIBRARY
Math Library (libm, -lm)
SYNOPSIS
#include <math.h> double nextafter(double x, double y); float nextafterf(float x, float y); long double nextafterl(long double x, long double y); double nexttoward(double x, long double y); float nexttowardf(float x, long double y); long double nexttowardl(long double x, long double y);
DESCRIPTION
These functions return the next machine representable number from x in direction y.
SEE ALSO
ieee(3), math(3)
STANDARDS
The nextafter(), nextafterf(), nextafterl(), nexttoward(), nexttowardf(), and nexttowardl() routines conform to ISO/IEC 9899:1999 (``ISO C99''). They implement the Nextafter function recommended by IEEE Std 754-1985, with the extension that nextafter(+0.0,, -0.0) returns -0.0, and nextafter(-0.0,, +0.0) returns +0.0.
HISTORY
The nextafter() function appeared in 4.3BSD, and nextafterf() appeared in FreeBSD 2.0.
BSD
May 4, 2005 BSD