C++ Hello World Program with Step-by-Step Guide

The "Hello, World!" program is the simplest and most traditional way to begin learning any new programming language.

In this tutorial, you'll learn how to write your first C++ Hello World Program with step-by-step comments and beginner-friendly formatting.

Whether you're searching for:

• Hello World for C++

• C++ Hello World Program

• C++ language Hello World example

You're at the right place!

Introduction to Hello World in C++

A "Hello, World!" program simply prints a greeting message on the screen. It helps you understand the basic structure of the C++ language such as:

• Headers (#include <iostream>)

• Main function (int main())

• Output statement (cout)

Basic C++ Hello World Program

// HELLO WORLD PROGRAM IN C++ USING MAIN FUNCTION
#include <iostream>
using namespace std;

// It's the main function of the program
int main()
{
    // Step-1 Display a label message
    cout << "C++ HELLO WORLD PROGRAM" << endl;

    // Step-2 Print the actual Hello World message
    cout << "HELLO, WORLD!" << endl;

    return 0;
}

Run

Output

C++ Hello World Program using Function

// HELLO WORLD PROGRAM IN C++ USING USER-DEFINED FUNCTION
#include <iostream>
using namespace std;

// Step-1 Create a function to display Hello World
void displayMessage()
{
    cout << "HELLO, WORLD!" << endl;
}

// It's the main function of the program
int main()
{
    // Step-2 Display a label
    cout << "C++ HELLO WORLD PROGRAM" << endl;

    // Step-3 Call the function to show the message
    displayMessage();

    return 0;
}

Run

C++ Hello World using Loop

// HELLO WORLD PROGRAM IN C++ USING FOR LOOP
#include <iostream>
using namespace std;

// It's the main function of the program
int main()
{
    // Step-1 Display a label
    cout << "C++ HELLO WORLD PROGRAM" << endl;

    // Step-2 Use loop to print message 3 times
    for (int i = 0; i < 3; i++)
    {
        cout << "HELLO, WORLD!" << endl;
    }

    return 0;
}

Run

C++ Hello World using Array

// HELLO WORLD PROGRAM IN C++ USING CHARACTER ARRAY
#include <iostream>
using namespace std;

// It's the main function of the program
int main()
{
    // Step-1 Create an array to store the message
    char message[] = "HELLO, WORLD!";

    // Step-2 Display a label
    cout << "C++ HELLO WORLD PROGRAM" << endl;

    // Step-3 Print the message using array
    cout << message << endl;

    return 0;
}

Run

C++ Hello World using if Condition

// HELLO WORLD PROGRAM IN C++ USING IF CONDITION
#include <iostream>
using namespace std;

// It's the main function of the program
int main()
{
    // Step-1 Display a label
    cout << "C++ HELLO WORLD PROGRAM" << endl;

    // Step-2 Use if condition to print the message
    bool show = true;
    if (show)
    {
        cout << "HELLO, WORLD!" << endl;
    }

    return 0;
}

Run

FAQs

Q1. Is using main() function mandatory in C++?
Yes, every C++ program must have a main() function as the entry point.

Q2. What does cout mean in C++?
cout is used to display output to the console. It's part of the iostream library.

Q3. Can we print Hello World without using main()?
No. C++ strictly requires main() to execute the program.