.isEmpty

The .isEmpty property will return a true value if there are no key-value pairs in a dictionary and false if the dictionary does contain key-value pairs.

dictionaryInstance.isEmpty

var bakery = [String:Int]()

print(bakery.isEmpty)

bakery["Cupcakes"] = 12

print(bakery.isEmpty)

In the example above, the bakery dictionary is checked if it .isEmpty; once when it is initiated, and again when a key-value pair is added. This will output:

true
false