Section: libc math functions (3)
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nextafter, nextafterf, nextafterl, nexttoward, nexttowardf, nexttowardl - floating point number manipulation
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.
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
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.
functions do the same as the
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.
C99. This function is defined in IEC 559 (and the appendix with
recommended functions in IEEE 754/IEEE 854).
- CONFORMING TO
- SEE ALSO
linux.jgfs.net manual pages