Can you name mutable data structures used in programming?

In programming, mutable data structures are those whose contents can be changed after creation. In Python, they include:

• Lists (list) — elements can be added, removed, or modified.
• Dictionaries (dict) — key-value pairs can be changed, added, or removed.
• Sets (set) — collections of unique elements that can be modified.
• Bytearrays (bytearray) — a mutable sequence of bytes.

Example:

my_list = [1, 2, 3]
my_list.append(4)  # list has changed

my_dict = {'a': 1}
my_dict['b'] = 2    # dictionary has changed

my_set = {1, 2}
my_set.add(3)       # set has changed

Unlike them, immutable structures include strings, tuples, and numbers.