May 2, 2025 · len () function is a built-in Python function and it's the simplest and most efficient way to find the length of a list in Python. It can be used on any sequence or collection, including lists. …

Nov 11, 2009 · Return the length (the number of items) of an object. The argument may be a sequence (such as a string, bytes, tuple, list, or range) or a collection (such as a dictionary, set, or frozen set). …

Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.

To find the length of a list in Python, you pass the list to len(), like len([1, 2, 3]). The len() function operates in constant time, O (1), as it accesses a length attribute in most cases. In this tutorial, you’ll …

Learn how to use the len () function in Python to find the length of a list. This guide provides clear examples and explanations.

Mar 7, 2025 · Learn how to find the length of a list in Python using the `len ()` function. This quick guide includes practical examples to help you measure list size easily.

Jun 23, 2025 · Learn how to use Python len () to count elements in strings, lists, and more. See examples, common errors, and how to use len () with custom classes.

Jul 24, 2025 · How to find the length of a list in Python using the len () function. Includes examples, edge cases, and tips for working with nested or dynamic lists.

Oct 23, 2025 · Master Python list lengths with our beginner's guide. Learn the len () function, its uses for loops, validation, and common pitfalls to write efficient code.

Feb 12, 2026 · Getting the length of a list in Python with len() — how it works, performance, and common patterns.