# C++ Programming/Code/Standard C Library/Functions/abs

## abs

editSyntax |
```
#include <cstdlib>
int abs( int num );
``` |

The abs() function returns the absolute value of *num*. For example:

```
int magic_number = 10;
cout << "Enter a guess: ";
cin >> x;
cout << "Your guess was " << abs( magic_number - x ) << " away from the magic number." << endl;
```