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Swift 3 Bottom Up: Ep1 - Constants, Variables, Types, and Comments
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| //: Playground - noun: a place where people can play | |
| import UIKit | |
| // Constants - Not Mutable, unchanging | |
| let constantString = "Hello" | |
| // Typed Constant | |
| let constantFloat: Float = 2 | |
| type(of: constantFloat) | |
| constantFloat | |
| /* Variables - The following variables are mutated and changed at will, they may not be the same as they were defined */ | |
| var changingString = "World" | |
| changingString = constantString + " " + changingString | |
| print("\(changingString)") | |
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Feel free to download this as .playground extension. Swift extension is used here to keep coloration.