To date, users have downloaded over 140 billion apps to their iPhones.¹ The iPhone’s success is tied to its ecosystem of third-party apps. When the App Store debuted in 2008, all apps were written in a programming language that few outside the Apple community had ever used: Objective-C. Since then, Objective-C’s usage has exploded in a gold rush of developers making apps. Although Apple introduced its new Swift language in 2014, most of Apple’s iOS operating system is still written in Objective-C, so it will be on Apple devices for years to come.
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