What Is Swift?

Swift is a powerful programming language designed by Apple for use on iOS, iPadOS, macOS, tvOS and watchOS operating systems.

Written by Anthony Corbo
Published on Jan. 03, 2023
Swift image of two hands holding a smartphone in a landscape configuration. The Swift logo appears on the screen, which includes the word Swift and a bird diving down and to the left.
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Lozen Liu | Jan 09, 2023

Swift uses concise code and simple syntax to make it easy to work with, scalable and approachable for newer developers.

Swift vs. C++

Although both Swift and C++ are object-oriented programming languages, the two excel in different areas. Swift is used to develop applications intended for Apple’s MacOS and iOS operating systems while C++ may be used for web and Android applications.  Swift is an evolution of Objective C, whereas C++ is an evolution of C. C++ is known to many for its excellent performance and is typically somewhat faster than Swift code but due to Apple’s OS dominance in the mobile space, creating mobile apps with C++ may be futile.

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What Is Swift Used For?

Swift is a programming language but can be viewed as a successor to the C and Objective C languages. Swift supports many of the core concepts found in Objective C, such as dynamic dispatch, widespread late binding and extensible programming, but Swift does so  in a way that makes it easier for developers to catch software bugs, which creates a safer overall language.

Swift also uses Objective C runtime libraries, thereby allowing the language to run alongside Objective C, C and C++ within the same program.

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What Are the Benefits of Swift?

Swift uses concise code, simplified syntax and eased grammar to make the language easy to write and understand. As a result, Swift is adaptable for developers of all skill levels. Although Swift is a newer programming language that originated in 2014 for use on Apple devices, we can now use Swift on Windows and most Linux-based operating systems, though this practice is still uncommon.

Swift’s use of Objective C runtime libraries on Apple platforms allows Swift, C, Objective C and C++ code to all run within the same program, thereby boosting the performance of C to an even greater level. 

Other areas where Swift excels include memory maintenance, overall speed and binary compatibility, as well as its cross-platform, open-source nature.

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