variables - Many ways of defining a Swift dictionary

Question

In swift there are quite a few ways on defining a dictionary. So, are all of these identical?

var dic1 = Dictionary<String, Int>()

var dic2 = [String:Int]()

var dic3: Dictionary = Dictionary<String, Int>()

var dic4: Dictionary = [String:Int]()

var dic5: Dictionary<String, Int> = Dictionary<String, Int>()

var dic6: Dictionary<String, Int> = [String: Int]()

Answer 1

Yes, all these 6 lines do produce the same result:

• an empty
• mutable
• dictionary
• where the key has type String
• and the value has type Int