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-'\" t
-.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
-.\"
-.\" SPDX-License-Identifier: Linux-man-pages-copyleft
-.\"
-.\" References consulted:
-.\" Linux libc source code
-.\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
-.\" 386BSD man pages
-.\" Modified Mon Mar 29 22:31:13 1993, David Metcalfe
-.\" Modified Sun Jun 6 23:27:50 1993, David Metcalfe
-.\" Modified Sat Jul 24 21:45:37 1993, Rik Faith (faith@cs.unc.edu)
-.\" Modified Sat Dec 16 15:02:59 2000, Joseph S. Myers
-.\"
-.TH abs 3 (date) "Linux man-pages (unreleased)"
-.SH NAME
-abs, labs, llabs, imaxabs \- compute the absolute value of an integer
-.SH LIBRARY
-Standard C library
-.RI ( libc ", " \-lc )
-.SH SYNOPSIS
-.nf
-.B #include <stdlib.h>
-.P
-.BI "int abs(int " j );
-.BI "long labs(long " j );
-.BI "long long llabs(long long " j );
-.P
-.B #include <inttypes.h>
-.P
-.BI "intmax_t imaxabs(intmax_t " j );
-.fi
-.P
-.RS -4
-Feature Test Macro Requirements for glibc (see
-.BR feature_test_macros (7)):
-.RE
-.P
-.BR llabs ():
-.nf
- _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
-.fi
-.SH DESCRIPTION
-The
-.BR abs ()
-function computes the absolute value of the integer
-argument \fIj\fP.
-The
-.BR labs (),
-.BR llabs (),
-and
-.BR imaxabs ()
-functions compute the absolute value of the argument \fIj\fP of the
-appropriate integer type for the function.
-.SH RETURN VALUE
-Returns the absolute value of the integer argument, of the appropriate
-integer type for the function.
-.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 abs (),
-.BR labs (),
-.BR llabs (),
-.BR imaxabs ()
-T} Thread safety MT-Safe
-.TE
-.SH STANDARDS
-C11, POSIX.1-2008.
-.SH HISTORY
-POSIX.1-2001, C99, SVr4, 4.3BSD.
-.\" POSIX.1 (1996 edition) requires only the
-.\" .BR abs ()
-.\" function.
-.P
-C89 only
-includes the
-.BR abs ()
-and
-.BR labs ()
-functions; the functions
-.BR llabs ()
-and
-.BR imaxabs ()
-were added in C99.
-.SH NOTES
-Trying to take the absolute value of the most negative integer
-is not defined.
-.P
-The
-.BR llabs ()
-function is included since glibc 2.0.
-The
-.BR imaxabs ()
-function is included since glibc 2.1.1.
-.P
-For
-.BR llabs ()
-to be declared, it may be necessary to define
-\fB_ISOC99_SOURCE\fP or \fB_ISOC9X_SOURCE\fP (depending on the
-version of glibc) before including any standard headers.
-.P
-By default,
-GCC handles
-.BR abs (),
-.BR labs (),
-and (since GCC 3.0)
-.BR llabs ()
-and
-.BR imaxabs ()
-as built-in functions.
-.SH SEE ALSO
-.BR cabs (3),
-.BR ceil (3),
-.BR fabs (3),
-.BR floor (3),
-.BR rint (3)