how to create a vector from elements of an existing vector in cpp

1// Initializing vector with values 
2    vector<int> vect1{1, 2, 3, 4}; 
3  
4    // Declaring another vector 
5    vector<int> vect2; 
6  
7    // Copying vector by assign function 
8    vect2.assign(vect1.begin(), vect1.end());