concat two vectors c++
#include <iostream>
#include <vector>
using namespace std;
int main() {
vector<int> vector1 = {1, 2, 3};
vector<int> vector2 = {4, 5, 6};
vector1.insert(vector1.end(), vector2.begin(), vector2.end());
for (int num : vector1) {
cout << num << " ";
}
return 0;
}