What does the len() function do when used on a list in Python?

easy📝 Conceptual Q11 of 15

Python - Magic Methods and Operator Overloading

What does the len() function do when used on a list in Python?

AIt returns the number of items in the list.

BIt returns the last item in the list.

CIt adds all the items in the list.

DIt removes the first item from the list.

Step-by-Step Solution

Solution:

Step 1: Understand the purpose of len()
The len() function counts how many items are inside a collection like a list.
Step 2: Apply to a list
When used on a list, it returns the total number of elements present in that list.
Final Answer:
It returns the number of items in the list. -> Option A
Quick Check:
len(list) = number of items [OK]

Quick Trick: Remember: len() counts items, it doesn't change them. [OK]

Common Mistakes:

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