(C++11) range-base for loop statement example.

range-base-for-loop.cpp

#include <iostream>
#include <vector>

int range_base_for_loop()
{
    std::vector<int> integers{2, 3, 5, 7, 13};
    for (auto&& x : integers)
    {
        std::cout << "x = " << x << std::endl;
        x += 1;
    }
    for (const auto& x : integers)
    {
        std::cout << "x = " << x << std::endl;
        // x += 1;  // error: assignment of read-only reference 'x'
    }
    return;
}