ABS(3) Linux Programmer's Manual ABS(3)NAME
abs, labs, llabs, imaxabs - compute the absolute value of an integer.
SYNOPSIS
#include <stdlib.h>
int abs(int j);
long int labs(long int j);
long long int llabs(long long int j);
#include <inttypes.h>
intmax_t imaxabs(intmax_t j);
DESCRIPTION
The abs() function computes the absolute value of the integer argument j. The labs(), llabs() and imaxabs() functions compute the absolute
value of the argument j of the appropriate integer type for the function.
RETURN VALUE
Returns the absolute value of the integer argument, of the appropriate integer type for the function.
CONFORMING TO
SVID 3, POSIX.1, BSD 4.3, ISO/IEC 9899 (C99). POSIX.1 (1996 edition) only requires the abs() function. ISO/IEC 9899:1990 (C89) only
includes the abs() and labs() functions; the functions llabs() and imaxabs() were added in C99.
NOTES
Trying to take the absolute value of the most negative integer is not defined.
The llabs() function is included in glibc since version 2.0, but is not in libc5 or libc4. The imaxabs() function is included in glibc
since version 2.1.1.
For llabs() to be declared, it may be necessary to define _ISOC99_SOURCE or _ISOC9X_SOURCE (depending on the version of glibc) before
including any standard headers.
GCC handles abs() and labs() as builtin functions. GCC 3.0 also handles llabs() and imaxabs() as builtins.
SEE ALSO ceil(3), floor(3), fabs(3), rint(3)GNU 2000-12-17 ABS(3)
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ABS(3) Linux Programmer's Manual ABS(3)NAME
abs, labs, llabs, imaxabs - compute the absolute value of an integer
SYNOPSIS
#include <stdlib.h>
int abs(int j);
long int labs(long int j);
long long int llabs(long long int j);
#include <inttypes.h>
intmax_t imaxabs(intmax_t j);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
llabs():
_XOPEN_SOURCE >= 600 || _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L;
or cc -std=c99
DESCRIPTION
The abs() function computes the absolute value of the integer argument j. The labs(), llabs() and imaxabs() functions compute the absolute
value of the argument j of the appropriate integer type for the function.
RETURN VALUE
Returns the absolute value of the integer argument, of the appropriate integer type for the function.
ATTRIBUTES
Multithreading (see pthreads(7))
The abs(), labs(), llabs(), and imaxabs() functions are thread-safe.
CONFORMING TO
SVr4, POSIX.1-2001, 4.3BSD, C99. C89 only includes the abs() and labs() functions; the functions llabs() and imaxabs() were added in C99.
NOTES
Trying to take the absolute value of the most negative integer is not defined.
The llabs() function is included in glibc since version 2.0, but is not in libc5 or libc4. The imaxabs() function is included in glibc
since version 2.1.1.
For llabs() to be declared, it may be necessary to define _ISOC99_SOURCE or _ISOC9X_SOURCE (depending on the version of glibc) before
including any standard headers.
GCC handles abs() and labs() as built-in functions. GCC 3.0 also handles llabs() and imaxabs() as built-ins.
SEE ALSO cabs(3), ceil(3), fabs(3), floor(3), rint(3)COLOPHON
This page is part of release 3.53 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
GNU 2013-06-21 ABS(3)
Hi everybody,
I'm trying to update GCC on my computer. It looks that the current GCC installation is not complete. What shall I do with the old GCC? Shall I uninstall it before installing a new one?
Mandrake Linux 10.1
Current GCC 3.4.1
The version being installed -- GCC 3.4.4.
Thanx,... (2 Replies)
Hi,
I am trying to find out how to get an absolute value for integer in ksh.
I tried using abs... but that doesn't work ! this is the workaround I did, but isn't there an inbuilt function to get absolute value for any variable !
Please help as i am new to unix :confused:
Thanks,
... (3 Replies)
Hi,
In unix box GCC installed under the /usr/local/bin/gcc, i want to know the version of GCC.
Could you please let me know the process for that.
Thanks & Regards,
Suji (1 Reply)
i need the unix systems programming labs solutions,labs are given on the following link,solutions links are also given bt they r forbidden:
CSPP51081: Labs
if any1 hv solutions plx share thm wid me...thx (1 Reply)
is there any function in unix which will convert a integer to absolute value with a single decimal point.
suppose x=15232
y=x/1024=14.875
i want y to be 14.8
Similarly if y=6.29452 it should come as 6.3 (3 Replies)