opensolaris man page for fmod

fmod(3M)						  Mathematical Library Functions						  fmod(3M)

NAME
       fmod, fmodf, fmodl - floating-point remainder value function

SYNOPSIS
       c99 [ flag... ] file... -lm [ library... ]
       #include <math.h>

       double fmod(double x, double y);

       float fmodf(float x, float y);

       long double fmodl(long double x, long double y);

DESCRIPTION
       These functions return the floating-point remainder of the division of x by y.

RETURN VALUES
       These 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 x or y is NaN, a NaN is returned.

       If y is 0, a domain error occurs and a NaN is returned.

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

       If x is +-0 and y is not 0, +-0 is returned.

       If x is not infinite and y is +-Inf, x is returned.

ERRORS
       These functions will fail if:

       Domain Error    The x argument is infinite or y is 0.

		       If the integer expression (math_errhandling & MATH_ERREXCEPT) is non-zero, the invalid floating-point exception is raised.

USAGE
       An application wanting to check for exceptions should call feclearexcept(FE_ALL_EXCEPT) before  calling	these  functions.  On  return,	if
       fetestexcept(FE_INVALID	|  FE_DIVBYZERO  |  FE_OVERFLOW  |  FE_UNDERFLOW) is non-zero, an exception has been raised. An application should
       either examine the return value or check the floating point exception flags to detect exceptions.

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO
       feclearexcept(3M), fetestexcept(3M), isnan(3M), math.h(3HEAD), attributes(5), standards(5)

SunOS 5.11							    12 Jul 2006 							  fmod(3M)