how to append two vectors in c++

Code to Append Two Vectors in C++

#include <iostream>
#include <vector>

int main() {
    std::vector<int> firstVector = {1, 2, 3};
    std::vector<int> secondVector = {4, 5, 6};

    firstVector.insert(firstVector.end(), secondVector.begin(), secondVector.end());

    for (int num : firstVector) {
        std::cout << num << " ";
    }

    return 0;
}