JScript  

Logical NOT Operator (!)

Performs logical negation on an expression.

result = !expression

Arguments

result
Any variable.
expression
Any expression.

Remarks

The following table illustrates how result is determined.

If expression is Then result is
True False
False True

All unary operators, such as the ! operator, evaluate expressions as follows:

The operator is applied to the resulting number.

For the ! operator, if expression is nonzero, result is zero. If expression is zero, result is 1.

Requirements

Version 1

See Also

~ Operator | Operator Precedence | Operator Summary