What function is used to get the length of a string or list?

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

Answer: (B)

The function used to obtain the length of a string or list in Python is len(). This built-in function takes one argument, which can be a string, list, tuple, or other iterable, and returns the number of items or the number of characters in the case of a string.

For example, if you have a string s = "Hello" and you call len(s), it will return 5, indicating that there are five characters in the string. Similarly, if you have a list lst = [1, 2, 3, 4], calling len(lst) will return 4, as there are four elements in the list.

Other options like length(), size(), and count() are not valid functions for this purpose in Python. length() is not defined in Python; size() is often found in other programming languages but not for obtaining the length of strings or lists in Python, and count() is a method that counts the occurrence of a specific value in a list or string but does not return the length.