Tuples and Dictionaries
CBSE · Class 11 · Computer Science
Summary of Tuples and Dictionaries for CBSE Class 11 Computer Science. Key concepts, important points, and chapter overview.
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Overview
Tuples are ordered, immutable sequences that can store elements of different data types, including numbers, strings, lists, and even other tuples. Dictionaries are mapping data types that store key-value pairs, where each key is unique and immutable, while values can be of any data type. Together, t
Key Concepts
A tuple is an ordered sequence
A tuple is an ordered sequence of elements. Its elements are enclosed in round brackets and separated by commas. It can store different data types, an
A tuple is immutable
A tuple is immutable, which means its elements cannot be changed after it is created. Attempting item assignment in a tuple raises a TypeError.
A single
A single-element tuple must have a trailing comma. Without the comma, the value is treated as its base type, not as a tuple.
Tuples support concatenation with +
Tuples support concatenation with +, repetition with *, membership testing with in and not in, and slicing. The repetition operator requires a tuple a
Useful tuple functions include len()
Useful tuple functions include len(), tuple(), count(), index(), sorted(), min(), max(), and sum(). sorted() returns a new sorted list and does not ch
Learning Objectives
- Understand the meaning and structure of tuples
- Learn how to access, combine, repeat, slice, and test tuples
- Use tuple methods and built-in functions such as len(), count(), index(), sorted(), min(), max(), and sum()
- Understand tuple assignment, nested tuples, and tuple handling in programs
- Understand the meaning and structure of dictionaries
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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