In Python, a constant<\/strong> is a type of variable whose value is not meant to be changed. You use constants to store values that you know should remain the same throughout your program.<\/p>\n \n Using constants makes your code safer and easier to understand. It helps prevent accidental changes to important data, such as the value of Pi (3.14159) or a maximum number of login attempts (5).<\/p>\n \n Unlike some other programming languages, Python does not have a strict, built-in feature to make variables unchangeable. Instead, Python developers use a naming convention<\/strong>. This is an agreement among programmers to signal that a variable should be treated as a constant.<\/p>\n\n The rule is simple and important: To declare a constant, you write the variable name in all uppercase letters<\/strong>. Use an underscore ( We will start with a simple example. Create a constant named The Naming Convention for Constants<\/h3>\n
_<\/code>)<\/strong> to separate words.<\/p>\n \n\n
PI = 3.14159<\/code><\/li>\n TAX_RATE = 0.07<\/code><\/li>\n WEBSITE_NAME = \"My Awesome Site\"<\/code><\/li>\n MAX_LOGIN_ATTEMPTS = 3<\/code><\/li>\n<\/ul>\n\n\nExercise 1: Define and Print a Constant<\/h2>\n
PI<\/code> with the value 3.14159<\/code> and then print it to the console.<\/p>\n \n