Swift Day1 in Playground

Optional typing

	let firstFloat: Float = 4
	let secondFloat = 4.0

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Operator Overload

	let label = "The width is "
	let width = 94
	let widthLabel = label + width (Error: Could not findgi)

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Simple String Format

	let apples = 3
	let oranges = 5
	let appleSummary = "I have \(apples) apples."
	let fruitSummary = "I have \(apples + oranges) pieces of fruit ."
	let name = "Tommy"
	let helloworld = "Nice to see you \(name) at \(3.0 + 4.5) years later."

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Option

	var optionalString: String? = "Hello"
	optionalString = nil
	var optionalName: String? = nil
	var gretting = "Hello!"
	if let name = optionalName {
	gretting = "Hello, \(name)"
	} else {
	gretting = "Hello anonymous"
	}

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Switch/Pattern Matching
let vegetable = "red pepper" switch vegetable { case "celery": let vegetableComment = "Add some raisins and make ants on a log" default: let vegetableComment = "Everything tastes good in soup" }