This series of articles goes through the basics of Swift. It introduces Playgrounds and REPL; Variables and Constants; Int, Float, Bool; Tuples, Type Aliases, Type Inference, Type Safety, and more.
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This article introduces the Playgrounds - a powerful tool to learn and play with Swift code. It also talks about REPL command line interpreter and IBM’s Swift Sandbox.
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This article discusses the boolean types in Swift and contrasts with how these types are used in C and Objective-C.
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Test on Boolean Types in Swift.
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Test on comments, structured comments, and markup in Swift
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