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A [[unary operator]] has one [[operand]].  

A '''unary operator''' has one [[operand]].  

For example, the [[minus sign]] turns a positive number into a negative number. -10 degrees Fahrenheit means 10 degrees below zero.

For example, the [[minus sign]] turns a positive number into a negative number. -10 degrees Fahrenheit means 10 degrees below zero.

In logic, the negation operator produces the opposite of a [[Boolean value]]. If A is true, then ~A is false. If B is false, ~B is true.

In logic, the negation operator produces the opposite of a [[Boolean value]]. If A is true, then ~A is false. If B is false, ~B is true.