In Swift, the syntax around using Strings is very much simpler than in Objective C, and the basics are similar to many modern languages.
We can create a string literal by using double quotes, as follows:
let salutation = "Hi Sally"
Single quotes won't do it:
let salutation = 'Hi Bob' // error
We can declare the empty string as an empty literal:
var emptyString1 = ""
We can also declare it by using the String initializer:
var emptyString2 = String()
The empty String object is not nil. To declare a String with no initialization, producing a nil String object, we do the following:
var nilString: String
To check for an empty (but non-nil) string, we can use the .isEmpty method of String:
emptyString1.isEmpty //returns true ...
