Описание тега boolean-expression
A boolean expression is an expression in a programming language that produces a boolean value when evaluated, i.e. one of true or false.
In computer science, a Boolean expression is an expression in a programming language that produces a Boolean value when evaluated, i.e. one of true or false. A Boolean expression may be composed of a combination of the Boolean constants true or false, Boolean-typed variables, Boolean-valued operators, and Boolean-valued functions.