An expression that compares two or more numerical values, yielding a Boolean variable(true or false), or for non-Boolean values such as (less than), (greater than),= (less than or equal to), and = (greater than or equal to).

Is a statement which is either true or false.

a complex query that uses Boolean operators to combine keywords

a logical statement that is either true or false

a mathematical expression that can only ever evaluate to true or false

an expression of type relation or of type logical or one of the Boolean constants true or false

an expression that results in a value of True, False, or Unknown

a rule for computing a logical value

a true or false statement

A statement which can be evaluated as true or false. For example, "Earth = the Moon" would be evaluated as false. Boolean expressions work with logical operators.

1. A type of expression based upon, or reducible to, a true or false condition. A boolean operator is a keyword that specifies how to combine simple logical expressions into complex expressions. Boolean operators negate a predicate (NOT), specify a combination of predicates (AND), or specify a list of alternative predicates (OR). For example, the use of AND in "DEPTH 100 and GPM 500." 2. Loosely, but erroneously, used to refer to logical expressions such as "DEPTH greater than 100."

A logical comparison between values yielding a true or false result. In M, zero means false and non-zero (often one) means true.

An expression that is defined recursively as follows: A Boolean variable is a Boolean expression; the negation of a Boolean expression is a Boolean expression; the junction of two Boolean expressions is a Boolean expression. Any of the sixteen binary junctors may be used to join two expressions.

An expression that evaluates to either True or False.

Boolean expressions are often encountered when doing searches on the web. In Boolean searching, you can use an AND operator between two words to find documents that contain both the words, or you can use an OR operator to find documents that contain either one of the words. For example, entering "privacy AND statement" will search for web pages that contain the "privacy statement"; entering "statement OR policy" will search for web pages that contain either "statement" or "policy".

An expression that yields a Boolean value.

A Boolean expression is an ECMAScript construct that evaluates to either true or false.

An expression that evaluates to a boolean value.

Named after the English mathematician Boole. See "Logical Expression."

An expression that evaluates to a value of true or false.

A mathematical expression in which all variables involved are either 0 or 1; it evaluates to either 0 or 1.

A type of expression that reduces to a true or false (logical) condition. A Boolean expression contains logical expressions (e.g., DEPTH 100) and Boolean operators. A Boolean operator is a keyword that specifies how to combine simple logical expressions into complex expressions. Boolean operators negate a predicate (NOT), specify a combination of predicates (AND), or specify a list of alternative predicates (OR). For example, DEPTH 100 AND DIAMETER 20. See also logical selection.

A Boolean expression is an expression that results in a Boolean value, that is, TRUE or FALSE. For example, the value for 5 > 3 is TRUE, the value for "An apple is not a fruit" is FALSE.