Confused a little

Your parameter is always external, but with swift you can choose to give it an external parameter name.

In case of Swift 1.2, the # is shorthand for

func greeting(person person: String) {
    println("Hello \(person)")
}

that is, shorthand for naming the external parameter just like the internal parameter.

So what are internal and external paramter names?

• Internal parameter name The name of the parameter you can access within the scope of the function
• External parameter name The name of the parameter you have to provide when calling the function

It is written the following way:

func myFunction(externalParamterName internalParameterName: Int) {
    // internalParameterName is the internal name and as such
    // accessible within the scope of this function
}
myFunction(externalParameterName: 2)

Please note that as of Swift 2, the # shorthand does not work any more. I have just answered a question here where parameter names are explained in detail, also check out the link to Apple Swift docs. But keep in mind this is for Swift 2!

awesome! thank you