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 …

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 …

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

Oct 26, 2025 · Learn what the len function does in Python, how to use it with lists, strings, and objects. Explore syntax, meaning, and coding examples.

Jan 23, 2025 · The len() function in Python is a built-in function that returns the number of items in an object. It takes a single argument, which can be a sequence (such as a string, list, or tuple) …

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 …

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 …

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