#include <iostream>

using namespace std ;

int main()
{
    int counter = 0;

    // Lambda capturing 'counter' by value and declared mutable
    auto increment = [counter]() mutable
    {
        // 'counter' can be modified inside the lambda because of 'mutable'
        counter++;
        cout << "Inside lambda: counter = " << counter << endl;
    };

    increment(); // Call the lambda
    increment(); // Call the lambda again
    increment(); // Call the lambda a third time

    cout << counter << endl;

    return 0;
}