CPP

iteraate through a vector

for(int i = 0; i < vec.size(); i++){
        cout << vec[i] << endl;
    }

vector iterating in c++

for(auto i = begin(vec); i  != end(vec); i++){
        cout << *i << endl;
    }
}

vector iterator in c++

vector<int>::iterator ptr;
for (ptr = ar.begin(); ptr < ar.end(); ptr++)
{
//do something at (*ptr)
}