Swift Dictionary Collections

Swift dictionaries allow data to be collected together in a single object with each element accessible via a key. Explore how to work with dictionaries in Swift including creating instances and inserting, deleting, and accessing entries.

Swift dictionaries allow data to be stored and managed in the form of key-value pairs. Dictionaries fulfill a similar purpose to arrays, except each item stored in the dictionary has a unique key associated with it, which can be used to reference and access the corresponding value. To be precise, the key is unique to the particular dictionary object. Currently, only String, Int, Double, and Bool data types are suitable for use as keys within a Swift dictionary.

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