Swift how to concat Strings

There are two ways to easily concat strings in Swift 

• Use the + operator
• Use the special character sequence to replace the String value

import UIKit

let stringA = "Hello "
let stringB = "World!"
//concat strings using the + operator
var newString = stringA + " " + stringB
print(newString)

//concat using special sequence of characters \()
newString = "\(stringA) \(stringB)"
print(newString)