I hope you are ready to get started and jump right in. Before we start writing Python programs, I want to show you a basic program that I've written and how one goes about running it. Are you excited? Let's get started. In all of the videos in this class, we're going to use CodeSkulptor to run our Python programs. CodeSkulptor is an online Python environment that we developed specifically to make learning the program easier. In order to open a file inside of CodeSkulptor, all you have to do is navigate to a URL in your web browser. So, if you click the link in this video, you should be looking at the Hello, world! Python program inside of CodeSkulptor in your web browser, just like I am. Hello, world! is a very basic introductory program. All it does is it prints out Hello, world! saying hello to you. So, how do we run this program? In CodeSkulptor, we go over here, and we click the run button. And now, you will see that it says Hello, world! to us in the output. Congratulations, you've run your first Python program. Now, I want to talk a little bit about the actual Python file that we just ran. So, if you look over here in the code pane, we have a bunch of lines of code here. Up at the top of the file, we have what is called a docstring. A docstring is a description of the purpose of this file. So, you can see there's a little explanation, it says it's my first Python program, right? And it's explaining what is in this file. Now, you can see that this is surrounded by triple quotes up here on the top and on the bottom, and this indicates to Python that this is a docstring. Next, we have a comment. And you can see we have a three-line comment here. Unlike docstrings, comments are not talking about the whole file, rather they are giving you an explanation of the small part of code that follows the comment. So, this is describing what the line of code on line 11 is actually doing, these comments here on lines 8 through 10. You can see that the comments are prefaced with these little hashtags that indicates to Python this is a comment. And you can put anything that you want into these docstrings and comments, they're for you to help you understand what's going on in the file and in the program and help others who open up your file look at it as well. Finally, down here, we have the actual line of Python code that's doing all the work, and it says print("Hello, world!"). And we're going to go into much more depth on this in future videos, but print is basically a function that says take whatever you give it and put it into the output pane. And what we're giving the print function is a string. You can see it's in quotes, the string Hello, world! Now, the print function, what it's doing? It took that string, Hello, world! and it put it over here in the output pane. So, it did what we told it to do. All right, there you have it. Now, you've seen your first Python program. You have a little bit of an understanding of exactly the structure of this program, and you're able to run it. In this video, I've shown you the basics of a simple Python file and how to run it. Now, we need to start actually teaching you Python so you can write your own programs. I hope I have whet your appetite for this and you're ready to go. See you soon.