Advanced Placement (AP) Computer Science

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What is the main purpose of the NOT Boolean operator?

To return the opposite of a true value
To check that one input is true
To combine multiple true values
To verify the authenticity of an input

The correct answer is: To return the opposite of a true value

The main purpose of the NOT Boolean operator is to return the opposite of a true value. This operator is unary, meaning it operates on a single operand, and its function is to invert the truth value of the expression it is applied to. If the input to the NOT operator is true, it results in false; conversely, if the input is false, the NOT operator yields true. This characteristic makes it a fundamental component in logical operations, often used in decision-making processes where determining the negation of a condition is necessary. This understanding allows programmers to construct more complex logical expressions and control the flow of programs effectively by utilizing negation where needed.