How do you use square brackets to put valid conditions inside a list?

In Python, a list is an ordered, mutable collection of items. You create a list by placing comma‑separated values inside square brackets. For example, to store a set of valid conditions, you can write: valid_conditions = ["condition1", "condition2", "condition3"]. Each string inside the brackets becomes an element of the list. You can also include other data types, such as integers or booleans: valid_conditions = [True, False, 42]. Once defined, you can iterate over the list, check membership with the 'in' keyword, or append new items using the .append() method. Using square brackets is the standard syntax for list literals in Python, and it allows you to group related items together for easy manipulation and access.