This manual page is part of the POSIX Programmer’s Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

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Description

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Examples

Application Usage

Rationale

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Copyright

remainder, remainderf, remainderl - remainder function

#include <math.h>

double remainder(doublex, doubley);

float remainderf(floatx, floaty);

long double remainderl(long doublex, long doubley);

These functions shall return the floating-point remainder

r=x-nywhenyis non-zero. The valuenis the integral value nearest the exact valuex/y. When |n-x/y|=0.5, the valuenis chosen to be even.The behavior of

remainder() shall be independent of the rounding mode.

Upon successful completion, these functions shall return the floating-point remainder

r=x-nywhenyis non-zero.If

xoryis NaN, a NaN shall be returned.If

xis infinite oryis 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.

These functions shall fail if:

If the integer expression (math_errhandling & MATH_ERRNO) is non-zero, then

Domain Error The xargument is ±Inf, or theyargument is ±0 and the other argument is non-NaN.errnoshall 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.

None.

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.

None.

None.

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>

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 |
REMAINDER (P) | 2003 |