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<cmath>
double abs ( double x );
float abs ( float x );
long double abs ( long double x );
Compute absolute value
Returns the absolute value of x ( /x/ ).
In C++, this function is overloaded in <cstdlib>, <complex> and <valarray> (see cstdlib abs, complex abs and valarray abs).
Parameters
- x
- Floating point value.
Return Value
The absolute value of x.
Portability
These overloads of abs are only available in C++.
In C, only the cstdlib version of exists (see cstdlib abs) - fabs can be used instead.
Example
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// cmath's abs example
#include <iostream>
#include <cmath>
using namespace std;
int main ()
{
cout << "The absolute value of 3.1416 is " << abs (3.1416) << endl;
cout << "The absolute value of -10.6 is " << abs (-10.6) << endl;
return 0;
}
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Output:
The absolute value of 3.1416 is 3.1416
The absolute value of -10.6 is 10.6
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See also
| abs | Absolute value (function) |
| fabs | Compute absolute value (function) |
| labs | Absolute value (function) |
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