best way to print in c++ code example

Example 1: how to print in c++

#include <iostream>
using namespace std;

int main(){
  cout<<"Hello World!"<< endl; // prints "Hello World"
  return 0;
}

Example 2: how to print in c++

#include <iostream>

int main() {
  std::cout << "Hello World!"; //cout keyword prints "Hello World!"
  return 0;
}