Essential Books

Trailing Closure Syntax

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When the last parameter of a function is a closure 

func loadData(id: String, completion:(result: String) -> ()) {
    // ...
    completion(result:"This is the result data")
}

the function can be invoked using the Trailing Closure Syntax 

loadData("123") { result in
    print(result)
}
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Functions:
* Functions
* Basic Use
* Methods
* Functions with Parameters
* Subscripts
* Operators are Functions
* Variadic Parameters
* Throwing Errors
* Inout Parameters
* Returning Values
* Functions With Closures
* Passing and returning functions
* Function types
* Trailing Closure Syntax
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