abs, labs, llabs, imaxabs
From cppreference.com
Defined in header
<stdlib.h>
|
||
int abs( int n );
|
||
long labs( long n );
|
||
long long llabs( long long n );
|
(since C99) | |
Defined in header
<inttypes.h>
|
||
(since C99) | ||
Computes the absolute value of an integer number. The behavior is undefined if the result cannot be represented by the return type.
Contents |
[edit] Parameters
n | - | integer value |
[edit] Return value
The absolute value of n
(i.e. |n|
), if it is representable.
[edit] Notes
In 2's complement systems, the absolute value of the most-negative value is out of range, e.g. for 32-bit 2's complement type int, INT_MIN is -2147483648, but the would-be result 2147483648 is greater than INT_MAX, which is 2147483647.
[edit] Example
Run this code
Output:
abs(+3) = 3 abs(-3) = 3
[edit] References
- C11 standard (ISO/IEC 9899:2011):
-
- 7.8.2.1 The imaxabs function (p: 218)
-
- 7.22.6.1 The abs, labs and llabs functions (p: 356)
- C99 standard (ISO/IEC 9899:1999):
-
- 7.8.2.1 The imaxabs function (p: 199-200)
-
- 7.20.6.1 The abs, labs and llabs functions (p: 320)
- C89/C90 standard (ISO/IEC 9899:1990):
-
- 4.10.6.1 The abs function
-
- 4.10.6.3 The labs function
[edit] See also
(C99)(C99)
|
computes absolute value of a floating-point value (|x|) (function) |
(C99)(C99)(C99)
|
computes the magnitude of a complex number (function) |
C++ documentation for abs
|