NEXTAFTER
Section: libc math functions (3)
Updated: 20020810
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NAME
nextafter, nextafterf, nextafterl, nexttoward, nexttowardf, nexttowardl  floating point number manipulation
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);
Link with lm.
DESCRIPTION
The
nextafter()
functions return the next representable neighbor of
x in the direction towards y. The size of the step
between x and the result depends on the type of the result.
If x = y the function simply returns y.
If either value is
NaN,
then
NaN
is returned. Otherwise a value corresponding to the value of the
least significant bit in the mantissa is added or subtracted,
depending on the direction.
The
nexttoward()
functions do the same as the
nextafter()
functions, except that they have a long double second argument.
These functions will signal overflow or underflow if the result
goes outside of the range of normalized numbers.
CONFORMING TO
C99. This function is defined in IEC 559 (and the appendix with
recommended functions in IEEE 754/IEEE 854).
SEE ALSO
nearbyint(3)
Index
 NAME

 SYNOPSIS

 DESCRIPTION

 CONFORMING TO

 SEE ALSO

linux.jgfs.net manual pages