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Engineering LibreTexts

1.16: Swift Examples

  • Page ID
    10595
  • File:Swift logo with text.svgOverview

    Swift is a general-purpose, multi-paradigm, compiled programming language developed by Apple Inc. for iOS, macOS, watchOS, tvOS, and Linux. Apple intended Swift to support many core concepts associated with Objective-C, but in a “safer” way, making it easier to catch software bugs. Swift was introduced in 2014.[1]

    Swift is a popular programming language for the Apple platforms it supports, but it lacks support for Microsoft Windows environments.[2].

    Example

    Hello World

    // This program displays "Hello world!"
    //
    // References:
    //     https://developer.apple.com/library/content/documentation/Swift/Conceptual/Swift_Programming_Language/GuidedTour.html
    
    print("Hello world!")

    Output

    Hello world!
    

    Discussion

    Each code element represents:[3]

    • // begins a comment
    • print() calls the print function
    • "Hello world!" is the literal string to be displayed

    Swift IDEs

    There are several free cloud-based and local IDEs available to begin coding in Swift. Check with your instructor or do your own research for recommendations.

    Local IDEs