A nested list is a list that contains another list. In other words, it is a list within a list. Nested lists can be used to organize data in a hierarchical structure. For example, you could use a nested list to represent a family tree, where each list item represents a person and the nested list represents that person's children.
How to create a nested list in HTML
To create a nested list in HTML, you can use the ul and li tags. The ul tag represents an unordered list, and the li tag represents a list item. To nest a list, you simply place the ul tag inside of a li tag.
For example, the following code creates a nested list of fruits:
HTML
<ul>
<li>Fruits:
<ul>
<li>Apples</li>
<li>Oranges</li>
<li>Bananas</li>
</ul>
</li>
</ul>
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This code will create a list with one item, "Fruits". The "Fruits" item will contain a nested list with three items, "Apples", "Oranges", and "Bananas".
How to create a nested list in Python
To create a nested list in Python, you can use the list constructor. The list constructor takes a list of elements as input, and returns a new list. To nest a list, you simply place one list inside of another list.
For example, the following code creates a nested list of fruits in Python:
Python
nested_list = [
["Apples", "Oranges", "Bananas"],
["Pears", "Grapes", "Strawberries"]
]
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This code will create a nested list with two items. The first item is a list with three elements, "Apples", "Oranges", and "Bananas". The second item is a list with three elements, "Pears", "Grapes", and "Strawberries".
Examples of nested lists
Here are some examples of nested lists:
A family tree
A directory structure
A shopping list
A to-do list
A menu
A product catalog