How useful are dictionaries in Python?

Dictionaries are useful if you need to store data in key-values pairs. Dictionaries are unordered. Values can be accessed for reading, modification, or deletion using keys (unlike lists that depend on indexes).

Dictionary has key and value pair its an example of data structure. dictionary used to store values. Dictionary represent a symbol {} the values of dictionary must be inside a curly brace.

Example: dict = {‘a’:1,’b’:2,’c’:3,’d’:4}