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. Required. An object. Must be a sequence or a collection. Built-in Functions.

Apr 15, 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.

To get the length of a string in Python, you use len() with the string as an argument, like len("example"). 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.

By implementing .__len__(), you enable your custom class to work seamlessly with the len() function, providing a way to determine the number of items it contains. In this tutorial, you'll learn how and when to use the len () Python function.

Summary: in this tutorial, you will learn how to use the Python len() function to get the number of items of an object. The len() function returns the number of items (length) of an object. Here’s …

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

Mar 22, 2025 · What is len() in Python? The len() function in Python is used to calculate the length of an object. In Python, many data structures such as strings, lists, tuples, sets, and dictionaries have a concept of length. The len() function returns an integer value representing the number of items in the given object.

By using this function, you can easily calculate the length of lists, tuples, strings, dictionaries, sets, and other collections. This function is particularly helpful in scenarios such as validating user input, controlling loops, and handling data in your Python applications.

Jan 5, 2025 · The len() function in Python is used to quickly determine the length or the number of items in a collection, such as a string, list, tuple, dictionary, or any other iterable object.

In this guide, we’ll dive deep into understanding how the len() function works, its versatility across data types, and practical examples to make the most of it in your Python programming journey. What is the len() Function? The len() function is a built-in Python method used to determine the number of items in an object.