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NEXTAFTER(3)
NEXTAFTER(3) FreeBSD Library Functions Manual NEXTAFTER(3)

NAME

nextafter, nextafterf, nextafterl, nexttoward, nexttowardf, nexttowardlnext 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.
May 4, 2005 FreeBSD