C++ Tutorial/Language Basics/using

#include <iostream>
int main()
{
   using namespace std;
  
   cout << "a new line ";
   cout <<  endl;
   return 0;
}

#include <iostream>
int main()
{
    using std::cout;
    using std::endl;
  
    cout << "Here is 5: " << 5 << "\n";
    cout << 8+5 << endl;
    return 0;
}