Dictionaries A dictionary holds an unordered collection of elements accessed by a key. Understanding dictionariesThis is an introduction to dictionaries.DICTIONARYA dictionary defines an associative array (hash-map) of elements.Dictionary initializersDictionaries can be initialized in their definition.Attributes on dictionary definitionsDictionaries can be defined with attributes, to complete the type description.Dictionary in actionDictionary methodsDictionary variables can be used to invoke built-in methods.ExamplesDictionary usage examples.