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RedHat 9 (Linux i386) - man page for nextafterf (redhat section 3)

NEXTAFTER(3)					 libc math functions					 NEXTAFTER(3)

NAME
nextafter, nexttoward - 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);
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 sig- nificant 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 sec- ond argument. These functions will signal overflow or underflow if the result goes outside of the range of normalized num- bers.
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)
GNU
2002-08-10 NEXTAFTER(3)


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