MirBSD manpage: nextafter(3), nextafterf(3)

NEXTAFTER(3)               BSD Programmer's Manual                NEXTAFTER(3)


     nextafter, nextafterf - next representable floating-point number




     #include <math.h>

     nextafter(double x, double y);

     nextafterf(float x, float y);


     The nextafter() and nextafterf() functions return the next machine
     representable number from x in direction of y. In other words, if y is
     less than x, the functions return the largest representable floating-
     point number less than x. When x equals y, the value of y is returned.
     The three functions differ only in the type of the return value and x.


     Upon successful completion, the described functions return the next
     representable floating-point value as described above. If x is finite but
     an overflow would occur, a range error follows and the functions return
     +-HUGE_VAL, +-HUGE_VALF, or +-HUGE_VALL with the same sign as x. When ei-
     ther x or y is NaN, a NaN is returned. When x is not y but the function
     value is subnormal, zero, or underflows, a range error occurs, and either
     0.0 or the correct function value (if representable) is returned.




     The described functions conform to ISO/IEC 9899:1999 ("ISO C99").

MirBSD #10-current             February 9, 2014                              1

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