Advanced Placement (AP) Computer Science

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How does the NOT Boolean operator evaluate an input of true?

The output is unfixed
The output is true
The output is false
The output is null

The correct answer is: The output is false

The NOT Boolean operator is a unary operator that inverts the truth value of a given input. When it evaluates an input of true, it switches that value to false. This behavior is fundamental to how Boolean logic operates, as NOT effectively negates the state of the input. Understanding this, when the input to the NOT operator is true, applying NOT will yield false. Thus, if you were to express this logically, it can be written as NOT(true) = false. This fundamental concept is crucial in programming and logic design, where decision-making often relies on the manipulation of Boolean values.