ALL CLASS OF STRING

 #include<iostream>

using namespace std;

int main()

{

    string str="hello world ";

    

    

    cout<<str.length()<<endl;

    cout<<str.size()<<endl;

    cout<<str.capacity()<<endl;

    cout<<str.size()<<endl;

    cout<<str.max_size()<<endl;

    cout<<str.empty()<<endl;

    cout<<str<<endl;

    return 0;

}