Which function is used to retrieve the length of a string in Python?

Which function is used to retrieve the length of a string in Python?

• A. count()
• B. length()
• C. len()
• D. size()

Answer: (C)

In Python, the function used to retrieve the length of a string is `len()`. This built-in function returns the number of characters in a string, including spaces and punctuation. For example, if you have a string like `"Hello, world!"`, using `len("Hello, world!")` would return 13, since there are 13 characters in that string. The `len()` function is versatile and can also be used with other iterable objects, such as lists and tuples, to find their length. This makes it a fundamental tool in Python programming for gauging the size of different data structures. Other options like `count()`, `length()`, and `size()` do not exist as built-in functions for directly retrieving the length of strings in Python, which further emphasizes the importance of knowing the correct function to use in various programming scenarios.

In Python, the function used to retrieve the length of a string is len(). This built-in function returns the number of characters in a string, including spaces and punctuation. For example, if you have a string like "Hello, world!", using len("Hello, world!") would return 13, since there are 13 characters in that string.

The len() function is versatile and can also be used with other iterable objects, such as lists and tuples, to find their length. This makes it a fundamental tool in Python programming for gauging the size of different data structures.

Other options like count(), length(), and size() do not exist as built-in functions for directly retrieving the length of strings in Python, which further emphasizes the importance of knowing the correct function to use in various programming scenarios.