what does this mean in english; You need to interpolate the value of the 'language' constant into the string you pass to

Zifcak,

According to the webster's dictionary:

: to put (something) between other things or parts; especially : to put (words) into a piece of writing or a conversation

According to Swift documentation:

https://developer.apple.com/library/ios/documentation/Swift/Conceptual/Swift_Programming_Language/StringsAndCharacters.html

excerpt:

"String interpolation is a way to construct a new String value from a mix of constants, variables, literals, and expressions by including their values inside a string literal. Each item that you insert into the string literal is wrapped in a pair of parentheses, prefixed by a backslash:

       let multiplier = 3
       let message = "\(multiplier) times 2.5 is \(Double(multiplier) * 2.5)"
       // message is "3 times 2.5 is 7.5"

In the example above, the value of multiplier is inserted into a string literal as (multiplier). This placeholder is replaced with the actual value of multiplier when the string interpolation is evaluated to create an actual string."

Hope that helps.

Regards,

Chris

Hello Zifcak:

/*
To be able to use string interpolation you have to use the \() 
inside a string. This will print the values that are being held
by a constant or a variable. For example.
*/

let greeting = "Hello"
let name = "Zifack"
let value = 1

println("\(greeting), \(name) this is the number \(value) website to learn swift”)

//This will print “Hello, Zifack this is the number 1 website to learn swift"