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iOS Swift Functions and Optionals Parameters and Tuples Tuples

Samuel Seidel
Samuel Seidel
1,481 Points
Posted by Samuel Seidel
Samuel Seidel
1,481 Points

Not sure what i'm doing wrong here

No idea what's happening here

tuples.swift 
func greeting(person: String) -> (language: String, greeting: String) {
    let language = "English"
    let greeting = "Hello \(person)"

    return (language, greeting)
}

var result = greeting(person: "Tom");

1 Answer

Jhoan Arango
Jhoan Arango
14,575 Points
Jhoan Arango
Jhoan Arango
14,575 Points

Hey Samuel :

The code looks good to me, all you need to do is take the “person” out of the function call. 

func greeting(person: String){}

var result = greeting("Tom")

If you had given your parameter an external name, then you would be able to use it while calling the function.

// Swift 1.2
 func greeting(#person: String){}

// Swift 2.0
func greeting(person person: String) {}


// Calling the function

var result = greeting(person: "Tom")

Here is a small explanation of the parameter names.

“Function parameters have both an external parameter name and a local parameter name. An external parameter name is used to label arguments passed to a function call. A local parameter name is used in the implementation of the function.”

“The Swift Programming Language” iBooks. https://itun.es/us/k5SW7.l