NCERT Book Class 11 Informative Practices Working With Lists and Dictionaries

Informatics Practices
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For Class 11 Informatics Practices, this chapter in NCERT Book Class 11 Informative Practices Working With Lists and Dictionaries provides a detailed overview of important concepts. We highly recommend using this text alongside the NCERT Solutions for Class 11 Informatics Practices to learn the exercise questions provided at the end of the chapter.

Chapter 4 Working with Lists and Dictionaries NCERT Book Class Class 11 PDF (2025-26)

4.1 INTRODUCTION TO LIST

The data type list is an ordered sequence which is mutable and made up of one or more elements. Unlike a string which consists of only characters, a list can have elements of different data types such as integer, float, string, tuple or even another list. A list is very useful to group elements of mixed data types. Elements of a list are enclosed in square brackets and are separated by comma.

Example 4.1

#list1 is the list of six even numbers

>>> list1 = [2,4,6,8,10,12]

>>> print(list1)

[2, 4, 6, 8, 10, 12]

#list2 is the list of vowels
>>> list2 = ['a','e','i','o','u']
>>> print(list2)
['a', 'e', 'i', 'o', 'u']
#list3 is the list of mixed data types
>>> list3 = [100,23.5,'Hello']
 
>>> print(list3)
[100, 23.5, 'Hello']
#list4 is the list of lists called nested
#list
>>> list4 =[['Physics',101],['Chemistry',202],
['Mathematics',303]]
 
>>> print(list4)
[['Physics', 101], ['Chemistry', 202],
['Mathematics', 303]]


4.1.1 Accessing Elements in a List
Each element in list is accessed using value called index. The fist index value is 0, the second index is 1 and so on. Elements in the list are assigned index values in increasing order sterling from 0.
To access an element, use square brackets with the index [] value of that element. We may also use negative index value to access elements starting from the last element in the list, having index value -0.
#initialing a list named list1
>>> list1 = [2,4,6,8,10,12]
>>> list1[0] #returns first element of list1
2
>>> list1[3] #returns fourth element of list1
8
#Out of range index value for the list returns error
>>> list1[15]
IndexError: list index out of range
#an expression resulting in an integer index
>>> list1[1+4]
12
>>> list1[-1] #return first element from right
12
#length of the list1 is assigned to n
>>> n = len(list1)
>>> print(n)
6
#Get the last element of the list1
>>> list1[n-1]
12
 


Click on the below link to download NCERT Class 11 Informative Practices Working With Lists and Dictionaries

Chapter 01 Computer System
NCERT Book Class 11 Informative Practices Computer System
Chapter 02 Emerging Trends
NCERT Book Class 11 Informative Practices Emerging Trends
Chapter 03 Brief Overview of Python
NCERT Book Class 11 Informative Practices Brief Overview of Python
Chapter 04 Working with Lists and Dictionaries
NCERT Book Class 11 Informative Practices Working With Lists and Dictionaries
Chapter 05 Understanding Data
NCERT Book Class 11 Informative Practices Understanding Data
Chapter 06 Introduction to NumPy
NCERT Book Class 11 Informative Practices Introduction To Numpy
Chapter 07 Database Concepts
NCERT Book Class 11 Informative Practices Database Concepts
Chapter 08 Introduction to Structured Query Language (SQL)
NCERT Book Class 11 Informative Practices Introduction To Structure Query Language
Other Chapters
CBSE Book Class 11 Informatics Practices Control Structures
CBSE Book Class 11 Informatics Practices Functions in MySQL
CBSE Book Class 11 Informatics Practices Hardware Concepts
CBSE Book Class 11 Informatics Practices IDE Programming
CBSE Book Class 11 Informatics Practices Information Security
CBSE Book Class 11 Informatics Practices Introduction to SQL
CBSE Book Class 11 Informatics Practices MySQL
CBSE Book Class 11 Informatics Practices Programming Fundamentals
CBSE Book Class 11 Informatics Practices Programming Guidelines
CBSE Book Class 11 Informatics Practices Sample Applications
CBSE Book Class 11 Informatics Practices Software Concepts

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NCERT Book Class 11 Informatics Practices Chapter 4 Working with Lists and Dictionaries

Download the official NCERT Textbook for Class 11 Informatics Practices Chapter 4 Working with Lists and Dictionaries, updated for the latest academic session. These e-books are the main textbook used by major education boards across India. All teachers and subject experts recommend the Chapter 4 Working with Lists and Dictionaries NCERT e-textbook because exam papers for Class 11 are strictly based on the syllabus specified in these books. You can download the complete chapter in PDF format from here.

Download Informatics Practices Class 11 NCERT eBooks in English

We have provided the complete collection of NCERT books in English Medium for all subjects in Class 11. These digital textbooks are very important for students who have English as their medium of studying. Each chapter, including Chapter 4 Working with Lists and Dictionaries, contains detailed explanations and a detailed list of questions at the end of the chapter. Simply click the links above to get your free Informatics Practices textbook PDF and start studying today.

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Does this Informatics Practices book follow the latest NCERT rationalized syllabus?

Yes, our collection of Class 11 Informatics Practices NCERT books follow the 2026 rationalization guidelines. All deleted chapters have been removed and has latest content for you to study.

Why is it better to download NCERT Book Class 11 Informative Practices Working With Lists and Dictionaries chapter-wise?

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