ldiv(3)

ldiv3

Compute quotient and remainder of an integer division

Part of div(3).

Usage

#include <stdlib.h>

div_t div(int numerator, int denominator); ldiv_t ldiv(long numerator, long denominator); lldiv_t lldiv(long long numerator, long long denominator);

#include <inttypes.h>

imaxdiv_t imaxdiv(intmax_t numerator, intmax_t denominator);

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

lldiv():

    _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L

Library

Standard C library (libc, -lc)

Overview

The div() function computes the value numerator/denominator and returns the quotient and remainder in a structure named div_t that contains two integer members (in unspecified order) named quot and rem. The quotient is rounded toward zero. The result satisfies quot*denominator+rem = numerator.

The ldiv(), lldiv(), and 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 quot and rem of the same type as the function arguments.

Return value

The div_t (etc.) structure.

Attributes

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

InterfaceAttributeValue
div(), ldiv(), lldiv(), imaxdiv()Thread safetyMT-Safe

Examples

After

div_t q = div(-5, 3);

the values q.quot and q.rem are -1 and -2, respectively.

Releases

19 releases since Debian 1.1 (Buzz); the text changed 13 times.

  1. 1.1–2.2
  2. 3.0
  3. 3.1
  4. 4.0
  5. 5.0
  6. 6.0
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12
  13. 13
  14. Arch

Standards

C11, POSIX.1-2008.

History

POSIX.1-2001, C89, C99, SVr4, 4.3BSD.

lldiv() and imaxdiv() were added in C99.

From man-pages 6.19-1 in Arch Linux 2026-11-01. Parsed by carta from the page's man source.