A condition is an expression that can be evaluated as either True or False. This is done using comparison operators, logical operators, and Booleans.

Comparison Operators
==	equal to
!=	not equal to
>	greater than
<	less than
>=	greater than or equal to
<=	less than or equal to

For example, the expression 15 < 20 would be True because 15 is indeed less than 20, and "hello" == "goodbye" would be False because the phrases "hello" and "goodbye" are not the same.

Logical operators can be used to make complex expressions. There are three logical operators:

• and - combines two expressions where both must be True
• or - combines two expressions where either must be True
• not - turns an expression from True to False and vice versa

Booleans are another type of variable that can have one of two values, either True or False. The name Boolean comes from the English mathematician George Boole, who did work in the field of logic.