Lists in Python

In the previous lesson, we learned about Functions and how they help organize and reuse code efficiently. Today, we will learn about Lists, one of the most commonly used data structures in Python.

Lists are important because they allow programmers to store multiple values in a single variable.

What is a List?

A List is a collection of multiple items stored in a single variable.

Lists are:

Ordered

Changeable (Mutable)

Allow duplicate values

Lists are created using square brackets "[]".

Example

languages = [ " Python " , " Java " , " C++ " ]

Enter fullscreen mode

Exit fullscreen mode

Accessing List Items

Each item in a list has an index number.

Python indexing starts from "0".

Example

languages = [ " Python " , " Java " , " C++ " ]

print ( languages [ 0 ]) print ( languages [ 1 ])

Enter fullscreen mode

Exit fullscreen mode

Output

Python Java

Enter fullscreen mode

Exit fullscreen mode

Negative Indexing

Python allows accessing items from the end using negative…