append to std::vector c++ code example

Example 1: adding element in vector c++

vector_name.push_back(element_to_be_added);

Example 2: how to append to a vector c++

//vector.push_back is the function. For example, if we want to add
//3 to a vector, it is just vector.push_back(3)
vector <int> vi;
vi.push_back(1); //[1]
vi.push_back(2); //[1,2]