hello world c++ using namespace std code example

Example 1: hello world c++

#include <iostream>


int main(){
 std::cout <<"Hello World" << std::endl;
 return 0;
}

Example 2: hello world c++

#include <iostream>

using namespace std;

int main() {
 cout << "Hello World" << endl;		// endl = '\n'
 return 0;
}

Example 3: hello world c++

#include <iostream>

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

Example 4: hello world program in c ++ using standard namespace

//using namespace 

#include<iostream>
using namespace std;
int main()
{
    cout<<"hello world"<<endl;
}