linux man page for fmodf

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

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():
	   _BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L;
	   or cc -std=c99

DESCRIPTION
       The  fmod() function computes the floating-point remainder of dividing x by y.  The return value is x - n * y, where n is the quotient of x
       / y, rounded towards 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 x and a  magni-
       tude less than the magnitude of y.

       If x or y is a NaN, a NaN is returned.

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

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

       If x is +0 (-0), and y is 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
	      errno is set to EDOM (but see BUGS).  An invalid floating-point exception (FE_INVALID) is raised.

       Domain error: y is zero
	      errno is set to EDOM.  An invalid floating-point exception (FE_INVALID) is raised.

BUGS
       Before version 2.10, the glibc implementation did not set errno to EDOM when a domain error occurred for an infinite x.

CONFORMING TO
       C99, POSIX.1-2001.  The variant returning double also conforms to SVr4, 4.3BSD, C89.

SEE ALSO
       remainder(3)

COLOPHON
       This  page is part of release 3.27 of the Linux man-pages project.  A description of the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.

								    2010-09-20								   FMOD(3)