<P> In computer science, the Boolean data type is a data type, having two values (usually denoted true and false), intended to represent the truth values of logic and Boolean algebra . It is named after George Boole, who first defined an algebraic system of logic in the mid 19th century . The Boolean data type is primarily associated with conditional statements, which allow different actions and change control flow depending on whether a programmer - specified Boolean condition evaluates to true or false . It is a special case of a more general logical data type; logic need not always be Boolean . </P> <P> In programming languages with a built - in Boolean data type, such as Pascal and Java, the comparison operators such as> and ≠ are usually defined to return a Boolean value . Conditional and iterative commands may be defined to test Boolean - valued expressions . </P>

Which of the following is not a possible value for a boolean variable