Boolean Algebra” is used to state the ‘open’ state or ‘false’ state in the form of 0 in the logic gate and the ‘closed’ state or ‘true’ state in the form of 1.

Whereas, “Boolean Expression” means an expression that consists of variables, constants, and logical operators which show the results in true or false in form of 0 (i.e., means true) and 1(i.e., means false).