# remquo - Man Page

remainder and part of quotient

## Library

Math library (*libm*, *-lm*)

## Synopsis

#include <math.h> double remquo(doublex, doubley, int *quo); float remquof(floatx, floaty, int *quo); long double remquol(long doublex, long doubley, int *quo);

Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

**remquo**(), **remquof**(), **remquol**():

_ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L

## Description

These functions compute the remainder and part of the quotient upon division of *x* by *y*. A few bits of the quotient are stored via the *quo* pointer. The remainder is returned as the function result.

The value of the remainder is the same as that computed by the remainder(3) function.

The value stored via the *quo* pointer has the sign of *x / y* and agrees with the quotient in at least the low order 3 bits.

For example, *remquo(29.0, 3.0)* returns -1.0 and might store 2. Note that the actual quotient might not fit in an integer.

## Return Value

On success, these functions return the same value as the analogous functions described in remainder(3).

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

If *x* is an infinity, and *y* is not a NaN, a domain error occurs, and a NaN is returned.

If *y* is zero, and *x* is not a NaN, a domain error occurs, and a NaN 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 or*y*is 0, and the other argument is not a NaN An invalid floating-point exception (

**FE_INVALID**) is raised.

These functions do not set *errno*.

## Versions

These functions first appeared in glibc in version 2.1.

## Attributes

For an explanation of the terms used in this section, see attributes(7).

Interface | Attribute | Value |
---|---|---|

remquo(), remquof(), remquol() | Thread safety | MT-Safe |

## Standards

C99, POSIX.1-2001, POSIX.1-2008.

## See Also

## Referenced By

The man pages remquof(3) and remquol(3) are aliases of remquo(3).