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 attributesDictionaries can be defined with attributes, to complete the type description.Dictionary initializersDictionaries can be initialized in their definition.Dictionary in actionDictionary methodsDictionary variables can be used to invoke built-in methods.ExamplesDictionary usage examples.