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[MUSIC PLAYING] DAN AMRMENDARIZ: Everyone, welcome to the CS50 seminar, iOS App Development with Swift. Im Dan Armendariz, and Im a preceptor of computer science here at Harvard. And the next hour is going to be a whirlwind tour of as much stuff about this topic as we can fit. I will post all of the source code that you will see today online. We might not be able to actually go over everything that Im that Im showing you in this hour. But at least hopefully through the comments of the source code, youll be able to try to figure out what exactly is happening for those things that we dont quite get to. Overall, the structure of todays talk will be as follows. Well start out doing some basic syntax with the Swift language, going into some of the more advanced syntax of the Swift language. Because the language is really modern and it has a lot of high level features, things that we havent seen in C throughout CS50, or even some the other languages that weve started us