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

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#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;
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fabs - labs