How can you retrieve the length of a string in Python?

How can you retrieve the length of a string in Python?

• A. Using the length() function
• B. Using the size() function
• C. Using the len() function
• D. By measuring character count

Answer: (C)

To retrieve the length of a string in Python, the correct approach is to use the built-in `len()` function. This function takes a single argument, which is the string (or other iterable objects), and returns an integer representing the number of characters in that string. For example, if you have a string `my_string = "Hello"`, using `len(my_string)` will return `5`, as there are five characters in that string. The `len()` function is straightforward and efficient, making it the most common method for determining the length of a string in Python. It is part of Python's core functionalities and is optimized for performance across various data types, including lists, tuples, and dictionaries as well. Other options would not yield the desired results for measuring string length in Python. The `length()` function is not defined in Python, and thus using it would result in a `NameError`. The `size()` function is not used for strings in Python; it is often associated with certain data structures in libraries like NumPy. Measuring character count manually, while theoretically possible, would require additional steps (like iterating through the string) and is far less efficient than just calling `len()`.

To retrieve the length of a string in Python, the correct approach is to use the built-in len() function. This function takes a single argument, which is the string (or other iterable objects), and returns an integer representing the number of characters in that string. For example, if you have a string my_string = "Hello", using len(my_string) will return 5, as there are five characters in that string.

The len() function is straightforward and efficient, making it the most common method for determining the length of a string in Python. It is part of Python's core functionalities and is optimized for performance across various data types, including lists, tuples, and dictionaries as well.

Other options would not yield the desired results for measuring string length in Python. The length() function is not defined in Python, and thus using it would result in a NameError. The size() function is not used for strings in Python; it is often associated with certain data structures in libraries like NumPy. Measuring character count manually, while theoretically possible, would require additional steps (like iterating through the string) and is far less efficient than just calling len().