Hello, C++!

C++ is a “core” language that lets you command the computer at a very low level.

Here too, there is a magic word: main. Type main.

You will see the entry point:

int main(int argc, char *argv[]) {  
      
}

CLion provides many helpful features like this.

C++ starts with almost nothing. If you want features, you must explicitly tell the computer to include them.

Add this at the top of your code:

#include <iostream>

What are include and iostream?

If you had to write all the code for input and output every time, one project would take forever.

So C++ keeps useful code in the Standard Library, and you bring it in when you need it. iostream is the part that helps the computer talk with the user.

Now let the computer speak.

Type: std::cout << "Hello World!";

What does this mean?

Take a closer look:

std::cout << "Hello World!";

std tells the computer to use the Standard Library. cout means you want the output tool from that library. << "Hello World!" means “send this text to cout.”

In plain English:

Get cout from the standard library and send it "Hello World!"

And cout is the tool that prints output to the user.