len() is a built-in Python function that stands for "length".
Its primary purpose is to return the number of items (or elements) in an object.
In the context of the current step, when you use len() on a string, like len(full_name), it counts the number of characters in that string, including spaces.
So, for full_name = "John Doe", len(full_name) evaluates to 8 because "J", "o", "h", "n", " ", "D", "o", "e" are 8 characters.
len() can also be used with other data types that contain multiple items, such as lists, tuples, dictionaries, and sets, to find out how many items they contain.
