What is a string in programming and how do you obtain its length in Python?

• A. A string is a sequence of characters; length is found with len(s) in Python.
• B. A string is a number; length is found with s.length().
• C. A string is a list of bits; length is found with bitcount(s).
• D. A string is a collection of bytes; length is found with s.size().

Answer: (A)

A string is a sequence of characters that stores text in order. In Python, strings are immutable and can include letters, numbers, spaces, and symbols.

To get how many characters are in a string, use the built-in function len(), passing the string as the argument. For example, s = "hello" then len(s) yields 5. In Python 3, this length counts Unicode code points (characters). If you need the number of bytes instead, you would encode the string first, such as len(s.encode('utf-8')).

Strings don’t have a length method like s.length() or s.size() in Python; the standard way to measure length for sequences is len().