Manpage of FMOD

FMOD

Section: Linux Programmer's Manual (3)
Updated: 2016-03-15
Index
 

NAME

fmod, fmodf, fmodl - floating-point remainder function  

SYNOPSIS

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

Link with -lm.

Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

fmodf(), fmodl():

_ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
    || /* Since glibc 2.19: */ _DEFAULT_SOURCE
    || /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
 

DESCRIPTION

These functions compute the floating-point remainder of dividing xby y. The return value is x- n* y, where nis the quotient of x/ y, rounded toward zero to an integer.  

RETURN VALUE

On success, these functions return the value x - n*y, for some integer n, such that the returned value has the same sign as xand a magnitude less than the magnitude of y.

If xor yis a NaN, a NaN is returned.

If xis an infinity, a domain error occurs, and a NaN is returned.

If yis zero, a domain error occurs, and a NaN is returned.

If xis +0 (-0), and yis not zero, +0 (-0) is returned.  

ERRORS

See math_error(7) for information on how to determine whether an error has occurred when calling these functions.

The following errors can occur:

Domain error: x is an infinity
errnois set to EDOM(but see BUGS). An invalid floating-point exception (FE_INVALID) is raised.
Domain error: y is zero
errnois set to EDOM. An invalid floating-point exception (FE_INVALID) is raised.
 

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).
InterfaceAttributeValue
fmod(), fmodf(), fmodl() Thread safetyMT-Safe
 

CONFORMING TO

C99, POSIX.1-2001, POSIX.1-2008.

The variant returning doublealso conforms to SVr4, 4.3BSD, C89.  

BUGS

Before version 2.10, the glibc implementation did not set errnoto EDOMwhen a domain error occurred for an infinite x.  

SEE ALSO

remainder(3)


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
ATTRIBUTES
CONFORMING TO
BUGS
SEE ALSO

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Time: 22:27:46 GMT, June 20, 2016