Access the last real item in string class (C++)

How to access the last item in string:

string s={"23d;fijaoweilkdc kd"};

s.begin() is pointing to item '2';
s.end() is pointing to item after 'd';

If we need to point to the last item, we can use

string::iterator it=(s.end()-1);  OR
string::iterator it=s.end(); --it;