Problem concatenating two string parameters in swift.

Question

Can somebody explain to me why i'm getting "Use of unresolved identifier" in this code? I thought that I was able to pass whatever I liked into the string and out came my answer.
func fullName(firstName: String, lastName: String) -> String {
    var myName = "(firstName) (lastName)"
    return myName
}
let myName = fullName(Peter, Fuhrey)
I apologize in advance if anything is unclear or just flat out doesn't make sense. I'm very new to programming.

Alvin Abia · Accepted Answer

Hey Peter, there's no need to apologize since your question is a completely valid one. You're right when you say that you could use your function fullName to pass two Strings and have a new one returned. The reason you're getting your error is for easily fixable syntax errors within your code. When you invoke the fullName function, you need to provide it with two strings as its parameters in order for it to return you a new String as you have designated in the function declaration here:
swift
func fullName(firstName:String, lastName:String) -> String

It's important to remember that Strings are always denoted by quotation marks so when you call your method, it should look like this:
swift
let myName = fullName("Peter",  "Fuhrey")

Also remember that if you want to use a variable directly in a string, you must denote so using a '\' character like this:
swift
var myName = "\(firstName) \(lastName)"

I hope this helps, Swift is a really fun language, and with a little practice, you'll definitely get the hang of it. Good luck

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Peter Fuhrey

Peter Fuhrey

Problem concatenating two string parameters in swift.

1 Answer

Alvin Abia

Alvin Abia

Peter Fuhrey

Peter Fuhrey