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.
Read more about Boolean Expression: Boolean Operators, Examples
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“Barring that natural expression of villainy which we all have, the man looked honest enough.”
—Mark Twain [Samuel Langhorne Clemens] (1835–1910)