REMAINDER(P) POSIX Programmer's Manual REMAINDER(P)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 ALSOabs() , 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 .
IEEE/The Open Group 2003 REMAINDER(P)
