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NCERT Class 11 Computer Science Dictionaries PDF
What is dictionary?
A dictionary is like a list, but more in general. In a list, index value is an integer, while
in a dictionary index value can be any other data type and are called keys. The key will
be used as a string as it is easy to recall. A dictionary is an extremely useful data storage
construct for storing and retrieving all key value pairs, where each element is accessed
(or indexed) by a unique key. However, dictionary keys are not in sequences and hence
maintain no left-to right order.
Key-value pair
We can refer to a dictionary as a mapping between a set of indices (which are called
keys) and a set of values. Each key maps a value. The association of a key and a value is
called a key-value pair.
Syntax:
my_dict = {'key1': 'value1','key2': 'value2','key3': 'value3'…'keyn': 'valuen'}
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Official NCERT E-Textbook: Dictionaries (NCERT)
Access the authorized NCERT Textbook for Class 11 Computer Science Dictionaries, revised for the current academic year. Recognized as the core reading material across schools nationwide, educators strongly recommend the Dictionaries e-textbook since board evaluations for Class 11 derive entirely from its syllabus guidelines. Easily download the complete chapter file in a convenient PDF format right here.
Digital E-Book Collection for Class 11 Computer Science
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