Return Types
Next you’ll create a function that returns its sum, which will also be of return type Int:
func sum(a: Int, b: Int) -> Int { return a + b}
This declaration can be read as “a function, sum, that takes two arguments of type Int and has a return value of type Int.” If you wanted to call the new function, it could look something like this:
let total = sum(14, 52)// total = 66
Returning a single value is just fine, but sometimes you want to return multiple values. In Objective-C, this problem is usually solved by creating an object class or by returning some sort of collection. These solutions would work in Swift as well, but there is a better way: You can return multiple arguments in Swift by using tuples, ...
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