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

**fmod**, **fmodf** - floating-point remainder function

libm

**#include <math.h>**
*double*
**fmod**(*double x*, *double y*);
*float*
**fmodf**(*float x*, *float y*);

The **fmod**() function computes the floating-point remainder of *x/ y*.

The **fmod**() and **fmodf**() 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 mag-
nitude less than the magnitude of *y*. If *y* is zero, whether a domain error
occurs or the **fmod**() function returns zero is implementation-defined.

math(3)

The **fmod**() function conforms to ANSI X3.159-1989 ("ANSI C89").
MirBSD #10-current May 2, 1991 1