Hello World Program in C++

Hello World Program in C++

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Vikram
Vikram Singh
Assistant Manager - Content
Updated on Aug 31, 2023 10:30 IST

Start your coding journey with the introductory program, i.e., Hello World Program in C++. This is one of the most simple but powerful programs that give you the idea of simple functions and syntax of the C ++ programming language. This article explains how to execute the hello world program in C++.

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A Hello World program in C++ is a simple and classic introductory program commonly used to learn the basics of C++ programming. The purpose of the hello world program in C++ is to give you a basic understanding of C++ functions and syntax. The hello world program serves as a starting point for beginners to get familiar with the syntax and structure of the C++ programming language.

In this article, we will briefly explain how to execute the hello world program in C++ and later in the article, we will also discuss some do’s and don’ts you can follow while learning C++ programming.

Must Read: What is C++?

Must Check: Top C++ Online Courses and Certificates

Before getting deeper into the article, you must set up the development environment where you will write and execute the code. Setting the environment includes choosing the right IDE (Integrated Development environment).
Some popular IDE you can choose includes Visual Studio Code, CLion, and Eclipse.

Writing the Hello World Program in C++

 
#include <iostream>
int main() {
std::cout << "Hello, World!";
return 0;
}
Copy code

Output

Hello, World!

Explanation

  • #include <iostream>: This line tells the compiler to include the iostream library containing input/output operations.
  • int main(): This is the main function where the program starts execution. Every C++ program must have a main function.
  • std::cout << “Hello, World!”;: This line outputs the text “Hello, World!” to the console. The std::cout is a predefined object in C++ that represents the standard output stream.
  • return 0;: This line ends the main function and returns the value 0.

As in the introduction, we have mentioned that C++ is an object-oriented programming language, i.e., we can write the above hello world program in C++ using a class.

Must Read: Difference Between C and C++
So, in the next example, we will define a class HelloWorld and write the hello world program.

Writing the Hello World Program in C++ Using a Class

 
#include <iostream>
class HelloWorld {
public:
void printMessage() {
std::cout << "Hello, World!";
}
};
int main() {
HelloWorld helloWorld;
helloWorld.printMessage();
return 0;
}
Copy code

Output

Hello, World!

Explanation

In the above program, we’ve created a class named HelloWorld with a public method named printMessage. This method, when called, prints the message “Hello, World!” to the console. In the main function, we create an object of the HelloWorld class and call the printMessage method.

Next Step After the Hello World Program

From the above two examples, you clearly understand how to write the hello world program in C++.
It’s just the beginning, and there’s much more you have to explore to be a pro in C++ programming language. You have to master the concepts like data types, operators, control structure, functions, and many more.
So, in the next section, we will suggest some do’s and don’ts that you can follow to master the concepts of C++ programming language.

Tips & Tricks to Learn C Programming

  • Understand the Basics
  • Practice Regularly
  • Work on Real Life Project
  • Learn to debug the code
  • Make a practice of writing the comments in between the code wherever required.
  • Write clean and readable codes
  • Understand the concepts of Memory Management

Common Mistakes to Avoid While Learning C++ Language

  • Ignoring the importance of C++ Basic concepts
  • Ignoring the compiler warnings
  • Improper Memory Management
  • Not using the Standard Library
  • Ignoring Error Handling
  • Not Using Proper Indentation and Formatting
  • Ignoring (or not learning) the importance of Oops concepts

Conclusion

The Hello World program in C++ is the introductory program of every beginner who just started learning. In this article, we have briefly covered how to write the hello world program in C++ using two different methods. Later in the article, we have also discussed some do’s and don’ts that you can follow to learn the C++ programming language concepts easily an quickly.

Hope you will like the article.

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FAQs

How to write Hello World program in C++?

Writing a Hello World program in C++ is quite straightforward. You need to include the iostream library, which allows for input and output operations, and then use the std cout object to print Hello, World! to the console.

What is Hello World Basic code in C++?

The hello world basic code includes, include iostream library, int main function, std cout, and return keyword. All four are combined together to print the hello world program in C++ programming language.

How to print hello world program in C++ using a class?

To print the hello world program in C++ using a class you have to create a class with a public method printMessage. When the print method is called, it will print the message to the console. In simple terms, an object of the class HelloWorld is created in the main function and then printMessage is called.

About the Author
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Vikram Singh
Assistant Manager - Content

Vikram has a Postgraduate degree in Applied Mathematics, with a keen interest in Data Science and Machine Learning. He has experience of 2+ years in content creation in Mathematics, Statistics, Data Science, and Mac... Read Full Bio