## Arrays / Lists We can assign values to variables in Python, like so: ```python my_variable = 7 print(my_variable) ``` We can assign many different types of values to variables: ```python my_number = 10 my_boolean = True my_string = 'hello!' ``` We can even type hint our variables: ```python my_typed_number: int = 9 my_typed_bool: bool = False my_typed_string: str = "hi!" ``` We can also update variables: ```python my_variable = 77 ``` ### Lists We can store collections of values in a list, or an array: ```python my_list: list = [7, "cat", True] print(my_list) ``` We can see that each item in the list has an index. It's important to remember that in Python, the first index is `0`. ```python # [7, "cat", True] # [0, 1, 2] ``` We can use square bracket notation to update a specific item in the list: ```python my_list[1] = "dog" print(my_list) ``` Python provides a convenient way to sort lists of numbers: ```python my_numbered_list = [0, 7, 8, 2, 3, 99] print(my_numbered_list) my_numbered_list.sort() print(my_numbered_list) ``` We can use the `.sort()` method to sort our list.