Boolean

This term refers to the logic computers use to determine if a statement is true or false. There are 4 main boolean operators: AND, NOT, OR, and XOR. Below are some examples of how the 4 operators work: x AND y retuns True if both x and y are true, otherwise the expression returns False.NOT x returns True if x is false (or null) and False if x is true.x OR y returns True if either x or y or both are true; only if they are both false will it return False.x XOR y returns True if either x or y are true, but not both. If x and y are both true or false, the statement will return False. Though Boolean expressions are what drive the CPUs in computers, they can be used by computer users to. Programmers often use boolean expressions in software development to control loops and variables. Also, many search engines will allow you to use boolean expressions to specify your search. For example, "Macintosh OR Apple NOT fruit" would help narrow a search for Apple Computer products.