fmod(3M)
NAME
fmod - floating-point remainder value function
SYNOPSIS
cc [ flag ... ] file ... -lm [ library ... ]
#include <math.h>
double fmod(double x, double y);
DESCRIPTION
The fmod() function returns the floating-point remainder of
the division of x by y.
RETURN VALUES
The fmod() function returns 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 x or y is NaN, NaN is returned. If y is 0, NaN is
returned and errno is set to EDOM. If x is _Inf, NaN is
returned. If y is non-zero, fmod(_0,y) returns the value of
x. If x is not _Inf, fmod(x,_Inf) returns the value of x.
ERRORS
The fmod() function may fail if:
EDOM y is 0.
No other errors will occur.
USAGE
Portable applications should not call fmod() with y equal to
0, because the result is implementation-dependent. The
application should verify y is non-zero before calling
fmod().
An application wishing to check for error situations should
set errno to 0 before calling fmod(). If errno is non-zero
on return, or the return value is NaN, an error has
occurred.
ATTRIBUTES
See attributes(5) for descriptions of the following attri-
butes:
____________________________________________________________
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|_____________________________|_____________________________|
| MT-Level | MT-Safe |
|_____________________________|_____________________________|
SEE ALSO
isnan(3M), attributes(5)
Man(1) output converted with
man2html