# A list is a collection of items.
# Lists are mutable: you can change their elements and their size.
# Similar to List<T> in C#, ArrayList<T> in Java, and array in JavaScript.
foo = [1, 2, True, "mixing types is fine"]
print(foo[0])
# Output - 1
foo[0] = 3
print(foo[0])
# Output - 3