An if statement lets you ask a question to the program and only run code if the answer is true.
Used to make comparisons between values.
A loop that has no way of stopping, and will keep looping forever.
Lets us repeat code as long as something is true.
Exits the current loop and resumes execution at the next statement.
Exits a function, optionally passing back an expression to the caller. A `return` statement with no arguments is the same as `return None`.
