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So, what exactly is GitHub Copilot?

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Well, in the end, it is an IDE extension you can add to different IDEs,

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to Visual Studio Code for example, but not just to that.

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And it is an extension that adds AI-powered features to those IDEs,

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so that as a developer you can use these features to write code more efficiently.

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Most importantly, it adds smart AI-powered code completion and suggestions generated by AI.

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And you probably already know that you probably already used this,

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but of course we're also going to use it in this course,

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and you'll maybe learn a thing or two about how to use this feature efficiently.

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It also allows us to generate entire blocks of code with AI right from inside the IDE,

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so that you don't need to go to some external website like ChatGPT to do that.

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And it got a code-aware chat you can use to ask questions about your code,

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to have it generate unit tests for your code,

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to ask questions about CLI commands, your terminal commands you might want to run,

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and many other useful related features.

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Now, it is important to note that GitHub Copilot is an extension you need to install,

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and whilst the installation is free, you have to pay,

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you have to have a subscription set up through GitHub.com to actually use it.

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You need to sign in with your GitHub account, and you must have a paid subscription there.

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Now, the next lecture contains more details about that setup process,

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because there also are different plans depending on whether you're just using it on your own,

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or if you're part of an organization, but that's in a nutshell what GitHub Copilot is.

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Now, it's worth noting that, of course, GitHub Copilot, like all these AI tools,

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is constantly evolving.

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It's getting new features, the existing features are getting better,

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and therefore, of course, the Copilot today might not be what it is in a year.

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In a year, it might be able to do more.

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But the core features added here have always been, and will probably always be,

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the heart, the foundation of GitHub Copilot,

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and that's why we'll take a closer look at them and some related features throughout this section.