C++ Program to Print Hello World

Write a simple C++ Program to Print Hello World with an example. Every program starts with a #include statement to include the preprocessor directives. Here, #include<iostream> includes the iostream file that helps us to use the cout statement. 

In this program, using namespace std helps to import the std namespace and print Hello World.

#include<iostream>

using namespace std;

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

If you don’t want to import namespace std (using namespace std;), then remove it and use C++ std::cout.

#include<iostream>

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

Hello World

Simple Program to Print Hello World Using Functions

#include<iostream>

using namespace std;

void disply_helloworld() 
{
	cout << "Hello World";
}

int main()
{	
	disply_helloworld();
	
	return 0;
}

Hello World!

In this example, we created a separate class (Message) that contains a method (disply_helloworld()) to print messages. Next, we created an instance of that class and called that method from out of the main program.

#include<iostream>

using namespace std;

class Message
{
	public: void disply_helloworld() {
		cout << "Hello World";
	}
};

int main()
{
	Message msg;
	
	msg.disply_helloworld();
	
	return 0;
}

Hello World