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GCSE Computer Science · key term
A logical operation that reverses its single input's truth value: true becomes false and false becomes true.
Used by OCR
Paper 2
A Boolean operator that reverses a Boolean value: True becomes False and False becomes True.
Revise: Common Boolean OperatorsThe Boolean operators AND, OR and NOT combine or reverse these values. In Python, they are written in lower case:
and,orandnot. Python's Boolean values are writtenTrueandFalse.
OR includes the case where both conditions are true: it means at least one, not exactly one.
Write each comparison in full: in Python, use age >= 12 and age <= 16, not age >= 12 and <= 16.
NOT has one input, so its truth table needs only two data rows.
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A logical operator that reverses its input: 0 becomes 1 and 1 becomes 0.