1.16: Swift Examples

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Overview

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.

Cloud-Based IDEs

GDB Online
IBM Swift Sandbox
Ideone
iSwift
paiza.IO
repl.it

Local IDEs

AppCode
Atom
Xcode

References

Wikiversity: Computer Programming

Swift (programming language) ↵
TIOBE: Index ↵
Wikibooks: Programming Fundamentals/Hello World ↵

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