std::abs(int)

Defined in header <cstdlib>

1	`int` `abs(` `int` `n );`

1	`long` `abs(` `long` `n );`

1	`long` `long` `abs(` `long` `long` `n );`

(since C++11)

1	`long` `labs(` `long` `n );`

1	`long` `long` `llabs(` `long` `long` `n );`

(since C++11)

Defined in header <cinttypes>

1	`std::intmax_t` `abs( std::intmax_t n );`

(since C++11)

1	`std::intmax_t imaxabs( std::intmax_t n );`

(since C++11)

Computes the absolute value of an integer number. The behavior is undefined if the result cannot be represented by the return type.

Parameters

integer value

Return value

The absolute value of n (i.e. |n|), if it is representable.

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.

Example

#include <iostream>
#include <cstdlib>
#include <climits>
  
int main()
{
    std::cout << "abs(+3) = " << std::abs(3) << '\n'
              << "abs(-3) = " << std::abs(-3) << '\n';
  
//  std::cout << abs(INT_MIN)); // undefined behavior on 2's complement systems
}

Output:

abs(+3) = 3
abs(-3) = 3

abs(float) fabs	absolute value of a floating point value (\|x\|) (function)
abs(std::complex)	returns the magnitude of a complex number (function template)
abs(std::valarray)	applies the function `std::abs` to each element of valarray (function template)
C documentation for `abs, labs, llabs`

std::abs(int)

Parameters

Return value

Notes

Example

See also