Swift string concatenation

let age = 28
let name = "John"
let isAlcoholic = true

var description = "\(name) is \(age) years old and \(isAlcoholic ? "is" : "isn't") alcoholic"

Declare empty string in swift

// Create a literal empty string
var emptyString = ""

// Create an optional string
var emptyVariable: String?  // This allows this variable to have a null value, or nil in swift

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