In this tutorial, you'll learn how and when to use the len () Python function. You'll also learn how to customize your class definitions so that objects of a user-defined class can be used as …

Definition and Usage The len() function returns the number of items in an object. When the object is a string, the len() function returns the number of characters in the string.

Jul 23, 2025 · The len () function in Python is used to get the number of items in an object. It is most commonly used with strings, lists, tuples, dictionaries and other iterable or container types.

Jun 23, 2025 · Learn how to use the Python len () function to quickly find the size of strings, lists, dictionaries, and other data structures. Discover practical examples and common mistakes to …

Oct 26, 2025 · What is Len in Python and How Does It Work? Understanding how to manage data structures efficiently is essential for programming, and Python offers built-in tools to simplify …

Apr 11, 2025 · Complete guide to Python's len function covering strings, lists, dictionaries, custom objects, and practical examples.

Nov 14, 2025 · What is len() in Python? The len() function in Python is a built - in function that returns the number of items in an object. It is a very straightforward function that takes a single …

Building on the core functionality we've seen, the len () function adapts uniquely to each data structure's characteristics, enabling precise length calculations for strings, lists, and …

Feb 8, 2025 · By "length," we mean the number of elements or items contained within the object. It is a polymorphic function, which means it can work with different types of data structures …

In this tutorial, we will learn about the Python len () function with the help of examples.