Python Coding Challange - Question With Answer(01200225)

 

Step-by-Step Execution:

1. Function Definition:

   python
   def extend_list(lst):
       lst.extend([10])

   • The function extend_list(lst) takes a list lst as an argument.
   • It uses .extend([10]), which appends 10 to the existing list.

2. List Initialization:

   python
   b = [5, 10, 15, 20]

   • A list b is created with four elements: [5, 10, 15, 20].
   • Initially, len(b) = 4.

3. Function Call:

   python
   extend_list(b)

   • The list b is passed to extend_list(lst).
   • Inside the function, lst.extend([10]) adds 10 to the end of b.
   • Now, b becomes [5, 10, 15, 20, 10].

4. Printing the Length:

   python
   print(len(b))

   • The updated list has 5 elements: [5, 10, 15, 20, 10].
   • len(b) returns 5.

Final Output:

5

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Key Points:

1. .extend([10]) appends 10 to the list.
2.  Since lists are mutable, b is modified directly.
3. The function does not return a new list; it updates the existing list.
4. len(b) increases from 4 to 5 after the function call.