Getting Started With Python's not Operator

00:00 Let’s take a look at how the not operator works in Python. Python uses not to implement the negation operation. Negation is a unary operation, meaning it takes just one expression as an operant. In Python, that operand could be a Boolean expression or another type of Python object.

00:23 If the operand it’s applied to evaluates to True, then the result of the not operation is False. Similarly, if the operand evaluates to False, then the result of the not operation applied to it is True.

00:39 Many times, the function of Boolean operators is described in a truth table. Here is the one for not. It basically says that if the operand is True, then not operand is False. And if the operand is False, then the not of it is True.

00:59 Where might you use the not operator? One case is when you’re looking for a condition that isn’t met during some if or while statement, negating or inverting the value of a Boolean expression, checking to see if an item is not in a given collection of things, and in sometimes checking for object identity.

01:22 And this course will show you examples of all of these.

01:28 First will be examples of negation.