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'\" t
.\" Copyright, the authors of the Linux man-pages project
.\"
.\" SPDX-License-Identifier: Linux-man-pages-copyleft
.\"
.TH div 3 2025-05-17 "Linux man-pages (unreleased)"
.SH NAME
div, ldiv, lldiv, imaxdiv \- compute quotient and remainder of
an integer division
.SH LIBRARY
Standard C library
.RI ( libc ,\~ \-lc )
.SH SYNOPSIS
.nf
.B #include <stdlib.h>
.P
.BI "div_t div(int " numerator ", int " denominator );
.BI "ldiv_t ldiv(long " numerator ", long " denominator );
.BI "lldiv_t lldiv(long long " numerator ", long long " denominator );
.P
.B #include <inttypes.h>
.P
.BI "imaxdiv_t imaxdiv(intmax_t " numerator ", intmax_t " denominator );
.fi
.P
.RS -4
Feature Test Macro Requirements for glibc (see
.BR feature_test_macros (7)):
.RE
.P
.BR lldiv ():
.nf
_ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
.fi
.SH DESCRIPTION
The
.BR div ()
function computes the value
.I numerator/denominator and
returns the quotient and remainder in a structure
named
.I div_t
that contains
two integer members (in unspecified order) named
.I quot
and
.IR rem .
The quotient is rounded toward zero.
The result satisfies
.IR "quot*denominator+rem\ =\ numerator" .
.P
The
.BR ldiv (),
.BR lldiv (),
and
.BR imaxdiv ()
functions do the same,
dividing numbers of the indicated type and
returning the result in a structure
of the indicated name, in all cases with fields
.I quot
and
.I rem
of the same type as the function arguments.
.SH RETURN VALUE
The
.I div_t
(etc.) structure.
.SH ATTRIBUTES
For an explanation of the terms used in this section, see
.BR attributes (7).
.TS
allbox;
lbx lb lb
l l l.
Interface Attribute Value
T{
.na
.nh
.BR div (),
.BR ldiv (),
.BR lldiv (),
.BR imaxdiv ()
T} Thread safety MT-Safe
.TE
.SH STANDARDS
C11, POSIX.1-2008.
.SH HISTORY
POSIX.1-2001, C89, C99, SVr4, 4.3BSD.
.P
.BR lldiv ()
and
.BR imaxdiv ()
were added in C99.
.SH EXAMPLES
After
.P
.in +4n
.EX
div_t q = div(\-5, 3);
.EE
.in
.P
the values
.I q.quot
and
.I q.rem
are \-1 and \-2, respectively.
.SH SEE ALSO
.BR abs (3),
.BR remainder (3)
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