What are nested lists in Python?

What are nested lists in Python?

Nested lists in Python are lists that contain other lists as their elements. They allow you to create complex data structures.

Can you give me an example of a nested list?

Sure! Here's an example: nested_list = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]. This list contains three lists.

How do I access elements in a nested list?

You can access elements using multiple indices. For example, nested_list[0][1] will give you 2, the second element of the first list.

What if I want to loop through all elements in a nested list?

You can use a nested loop. For example:

for sublist in nested_list:
    for item in sublist:
        print(item)