The Open Group Base Specifications Issue 7, 2018 edition
IEEE Std 1003.1-2017 (Revision of IEEE Std 1003.1-2008)
Copyright © 2001-2018 IEEE and The Open GroupA newer edition of this document exists here
NAME
abs - return an integer absolute value
SYNOPSIS
#include <stdlib.h>
int abs(int i);
DESCRIPTION
[CX] ![[Option Start]](../images/opt-start.gif)
The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the
requirements described here and the ISO C standard is unintentional. This volume of POSIX.1-2017 defers to the ISO C
standard.
![[Option End]](../images/opt-end.gif)
The abs() function shall compute the absolute value of its integer operand, i. If the result cannot be
represented, the behavior is undefined.
RETURN VALUE
The abs() function shall return the absolute value of its integer operand.
ERRORS
No errors are defined.
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
In two's-complement representation, the absolute value of the negative integer with largest magnitude {INT_MIN} might not be
representable.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
fabs, labs
XBD <stdlib.h>
CHANGE HISTORY
First released in Issue 1. Derived from Issue 1 of the SVID.
Issue 6
Extensions beyond the ISO C standard are marked.
End of informative text.
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