In line 9 around the 8-minute mark, Amit wrote "var greeting = "\(str) \(modernProgrammingLanguage)" (str) refers to ?

It is referring to the value which has been assigned to var str.

That's what I would have thought, Frank, but maybe I'm missing something.

The only line in which I saw var could have been assigned something was in the line where it said: var str : String = "Hello "

However the word "Hello" was not shown on the Console Output even after having referenced it.

He wrote:

"var greeting = "(str) (modernProgrammingLanguage)", and on the right it only read: To build an iPhone app we need to learn Objective-C."

(Note: it reads objective-C rather than Swift because he was showing us how to change things around as we liked.)

The reason why "Hello" is not being printed to the console is because he is not calling the variable str to be printed. When he created the greeting variable he was just creating a variable that contained a string and that could be printed later on. If you wanted to print out greeting, you could do something like this

println(greeting)

Hope this helped,

Ozzie

Okay. Thanks, Ozzie and Frank. I'll be sure to go over this section again. :)

Don't forget that those final lines of code in the example are on two lines because he shrunk the pane!