Nov 16, 2024 · In this tutorial, you’ll learn when to use the len() Python function and how to use it effectively. You’ll discover which built-in data types are valid arguments for len() and which …

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.

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

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 …

5 days ago · Discover what is len in Python, how the len() function works with strings, lists, dictionaries and custom classes, and best practices for efficient code.

Python len () built-in function returns an integer representing the number of items in the given iterable. In this tutorial, you will learn the syntax of len () function, and then its usage with the …

Jun 19, 2025 · The len() function in Python is used to return the length (the number of items) of an object. The object can be a sequence (such as strings, lists, tuples) or a collection (such as …

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 …

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 …