Class 11 Computer Science — Chapter 4: Working with Lists and Dictionaries

What you'll learn

• ▸Creating and Initializing Lists
• ▸Accessing List Elements using Indexing
• ▸List Mutability
• ▸List Operations: Concatenation and Repetition
• ▸Membership Operators
• ▸List Slicing
• ▸Traversing a List
• ▸Methods that Modify Lists (In-place)
• ▸Functions and Methods for List Inspection

Chapter Summary

--- PAGE 1 --- --- PAGE 2 --- 56 INFORMATICS PRACTICES - CLASS XI NOTES #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,…

Practice Questions from this Chapter

Tap "Get Solution" on any question to ask our AI tutor.

1. Explain practical list uses. Get Solution →
2. Show list examples in apps. Get Solution →
3. Discover other data structures. Get Solution →
4. What is the index of the first element in a Python list? Get Solution →
5. Which property of Python lists means their contents can be changed after creation? Get Solution →
6. What operator is used to join two or more lists together? Get Solution →
7. Which operator is used to replicate the contents of a list multiple times? Get Solution →
8. What does the `in` operator check for in a list? Get Solution →

Did you know?

• 💡 Ancient civilizations used lists to record harvests and inventories.
• 💡 The human brain stores memories in intricate, interconnected list-like structures.
• 💡 A computer's memory is like a giant list of numbered storage locations.
• 💡 Every time you search online, the search engine uses complex lists to find results.
• 💡 Some of the first computer programs were essentially long lists of instructions.

Frequently Asked Questions

Related Chapters