NAME

       remainder, remainderf, remainderl - remainder function

SYNOPSIS

       #include <math.h>

       double remainder(double x, double y);
       float remainderf(float x, float y);
       long double remainderl(long double x, long double y);

DESCRIPTION

       These functions shall return the floating-point remainder r= x- ny when y is non-zero. The value n is the
       integral value nearest the exact value x/ y.  When |n-x/y|=0.5, the value n is chosen to be even.

       The behavior of remainder() shall be independent of the rounding mode.

RETURN VALUE

       Upon successful completion, these functions shall return the floating-point remainder r= x- ny when y  is
       non-zero.

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

       If  x  is  infinite  or y is 0 and the other is non-NaN, a domain error shall occur, and either a NaN (if
       supported), or an implementation-defined value shall be returned.

ERRORS

       These functions shall fail if:

       Domain Error
              The x argument is ±Inf, or the y argument is ±0 and the other argument is non-NaN.

       If the integer expression (math_errhandling & MATH_ERRNO) is non-zero, then errno shall be set to [EDOM].
       If  the  integer  expression  (math_errhandling & MATH_ERREXCEPT) is non-zero, then the invalid floating-
       point exception shall be raised.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       On error, the expressions (math_errhandling & MATH_ERRNO) and  (math_errhandling  &  MATH_ERREXCEPT)  are
       independent of each other, but at least one of them must be non-zero.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       abs()   ,  div()  ,  feclearexcept()  ,  fetestexcept()  ,  ldiv()  ,  the  Base  Definitions  volume  of
       IEEE Std 1003.1-2001, Section 4.18, Treatment of Error Conditions for Mathematical Functions, <math.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition,
       Standard  for  Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base
       Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers,
       Inc  and  The  Open Group. In the event of any discrepancy between this version and the original IEEE and
       The Open Group Standard, the original IEEE and The Open Group  Standard  is  the  referee  document.  The
       original Standard can be obtained online at http://www.opengroup.org/unix/online.html .