remainderf man page on FreeBSD

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REMAINDER(3)		 BSD Library Functions Manual		  REMAINDER(3)

     remainder, remainderf, remainderl, remquo, remquof, remquol — minimal
     residue functions

     Math Library (libm, -lm)

     #include <math.h>

     remainder(double x, double y);

     remainderf(float x, float y);

     long double
     remainderl(long double x, long double y);

     remquo(double x, double y, int *quo);

     remquof(float x, float y, int *quo);

     long double
     remquol(long double x, long double y, int *quo);

     remainder(), remainderf(), remainderl(), remquo(), remquof(), and
     remquol() return the remainder r := x - n∗y where n is the integer near‐
     est the exact value of x/y; moreover if |n - x/y| = 1/2 then n is even.
     Consequently the remainder is computed exactly and |r| ≤ |y|/2.  But
     attempting to take the remainder when y is 0 or x is ±∞ is an invalid
     operation that produces a NaN.

     The remquo(), remquof(), and remquol() functions also store the last k
     bits of n in the location pointed to by quo, provided that n exists.  The
     number of bits k is platform-specific, but is guaranteed to be at least

     fmod(3), ieee(3), math(3)

     The remainder(), remainderf(), remainderl(), remquo(), remquof(), and
     remquol() routines conform to ISO/IEC 9899:1999 (“ISO C99”).  The remain‐
     der is as defined in IEEE Std 754-1985.

     The remainder() and remainderf() functions appeared in 4.3BSD and
     FreeBSD 2.0, respectively.	 The remquo() and remquof() functions were
     added in FreeBSD 6.0, and remainderl() and remquol() were added in
     FreeBSD 8.0.

BSD				March 30, 2008				   BSD

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