Use the assignment operator `=`
Example: `x = 10`
Example: `name = “Alice”`
Example: `is_valid = True`
Variable names must start with a letter or underscore
Variable names can contain letters, digits, and underscores
Variable names are case-sensitive
You can assign multiple variables at once: `a, b = 1, 2`
You can reassign a variable by using `=`
You can define a variable without a type declaration