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.

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 arguments in …

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 avoid …

Oct 26, 2025 · What is the Len Function in Python? The len function in Python is a built-in utility that returns the number of items in a container, such as lists, tuples, strings, and dictionaries. …

May 23, 2022 · The len() function returns the number of items in an object. It is one of Python’s most commonly used built-in functions that calculates the length or size of various data types including …

In this tutorial, you will learn how to use the Python len () function to get the number of items of an object.

Python len function finds length or total number of items in object. Lets use Python len function on string, Tuple, List, Dictionary, Sets.

Apr 11, 2025 · Key characteristics: returns integer count of items, raises TypeError for non-sequence types, and calls __len__ method for custom objects. It's a fundamental operation for container types. …

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