What will be printed out as a result of the following code execution?

#include <iostream>

int foo()
    return 1, 2, 3, 4, 5;

int main()
    std::cout << foo() << std::endl;

    return 0;
«5» will be printed out. The comma operator «,» works from left to right. It returns its second parameter by default. In the given example the execution will go as follows: ((((1, 2), 3), 4), 5)
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