Every C++ program **must have** a **main()** function. The syntax of it looks like this:

```cpp
int main()
{
    return 0;
}
```

- `int main()`: the starting point of a program. It's called the main function, and it's where the program begins executing;
- `{ }`: curly braces define a block of code. Everything inside these braces belongs to the main function and is part of the program's logic;
- `return 0;`: marks the end of the program and indicates that it ran successfully. The 0 means everything went well. If there were issues, this value might be different in the output.

> Note
>
> The `return 0;` statement **is optional** at the end of **the main function**. If omitted, the compiler will automatically insert it.

What is the purpose of the main() function in a program?

Start your path to becoming a skilled developer by mastering the foundational principles of programming through C++. Whether you're starting from scratch or already have some coding experience,  this course will provide you with the solid foundation needed to become a proficient developer and open the doors to a wide range of career opportunities in software development and engineering. Let's study C++!

In this section, we dive into learning the structure of a default C++ program

In this section, we will learn how to manipulate different variables.

In this section, we will learn how to equate and compare variables, and use mathematical and bitwise operators.

In this section, we will learn how to control the flow of our programs.

In this section, we will explore the concept of functions, and how to create and call them.

C++ Introduction

Entry Point of a Program