Titlebook: Learn Swift on the Mac; For OS X and iOS Waqar Malik Book 20151st edition Apress 2015

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Constants, Variables, and Data Types,In OOP languages, an immutable object is an object whose state can’t be modified. Swift calls these constants. Once a constant object has been created and an initial value assigned, it can’t be changed. In contrast, an object whose value can be changed is a mutable object. Swift calls these variables.

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Flow Control,In programming, Control Flow referes to the order of instructions (statements) are executed. Swift provides the standard set of conditional constructs. These include for, while, if and switch, plus break and continue to transfer the control to another location in the code.

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ONYM

Classes and Structures,In Chapter 4 you learned about object-oriented programming (OOP), and how an object can be represented in Swift as a class, a structure, or an enumeration type.

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GUILT

Inheritance,When you write an object-oriented program, the classes and objects you create have relationships with one another. They work together to make your program do its thing.