iOS, originally called iPhone OS, is the operating system on Apple's handheld devices like the iPhone, iPad, etc. The first version of the operating system was released in January 9, 2007.
iOS was programmed using C, C++, Objective-C, and Swift, all programming languages. C is a general purpose programming language and is used for supporting the Unix System, which is similar to the system used in iOS, called Unix-like. Unix-like behaves like the Unix System except it is not within the confines of the unix system standard or specific specifications required to be classified as a unix system.
C++ is also a general purpose language and was made with a bias toward system programming and embedded, both used to control machines. C++ is known for its performance, efficiency, and flexibility of use. Which makes sense that iOS would use these two languages to keep its simplicity, a reason why iOS is smooth and barely lags as apposed to the Android operating system which can suffer from lag from time to time. Android utilizes Java. Java can be a bit more complicated when it comes to operating systems.
iOS was programmed using C, C++, Objective-C, and Swift, all programming languages. C is a general purpose programming language and is used for supporting the Unix System, which is similar to the system used in iOS, called Unix-like. Unix-like behaves like the Unix System except it is not within the confines of the unix system standard or specific specifications required to be classified as a unix system.
C++ is also a general purpose language and was made with a bias toward system programming and embedded, both used to control machines. C++ is known for its performance, efficiency, and flexibility of use. Which makes sense that iOS would use these two languages to keep its simplicity, a reason why iOS is smooth and barely lags as apposed to the Android operating system which can suffer from lag from time to time. Android utilizes Java. Java can be a bit more complicated when it comes to operating systems.
Since iOS uses the specific language listed earlier, it means that only certain developers can create apps and submit them to the app store. These developers are required to use these languages because iOS is only compatible with these specific languages. The operating system also requires apps being developed to be compatible with the hardware of Apple devices so that performance is not compromised. Some third-party attempts have been made to try and utilize Java, but due to apple's strict restrictions, these attempts of creating apps have not been successful to make it to the app store. Overall iOS is a simple operating system that is complex on the inside, we dot usually realize that there are very complex operations that take place in order for us to use our Apple devices.
References:
http://images.slideplayer.com/25/7954067/slides/slide_4.jpg
https://en.wikipedia.org/wiki/IOS
https://en.wikipedia.org/wiki/C%2B%2B
https://en.wikipedia.org/wiki/Unix-like
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