| FMOD(3) | Library Functions Manual | FMOD(3) | 
fmod, fmodf,
  fmodl —
#include <math.h>
double
  
  fmod(double
    x, double y);
float
  
  fmodf(float
    x, float y);
long double
  
  fmodl(long
    double x, long double
    y);
fmod() function computes the floating-point
  remainder of x/ y.
fmod(), fmodf(), and
  fmodl() functions return the value
  x- i*y, for some
  integer i such that, if y is non-zero,
  the result has the same sign as x and magnitude less
  than the magnitude of y. If y is
  zero, whether a domain error occurs or the fmod()
  function returns zero is implementation-defined.
fmod() function conforms to ANSI
  X3.159-1989 (“ANSI C89”).
| November 12, 2013 | NetBSD 9.3 |