Microsoft® JScript™ ~ Operator | Language Reference Version 1

See Also

##### Description

> Used to perform a bitwise NOT (negation) on an expression.

##### Syntax

> result = ~ expression

> The ~ operator syntax has these parts:

> Part | Description
> result | Any variable.
> expression | Any expression.

##### Remarks

> All unary operators, such as the ~ operator, evaluate expressions as follows:
> - If applied to undefined or null expressions, a run-time error is raised.
> - Objects are converted to strings.
> - Strings are converted to numbers if possible. If not, a run-time error is raised.
> - Boolean values are treated as numbers (0 if false, 1 if true).
> The operator is applied to the resulting number.

> The ~ operator looks at the binary representation of the values of the expression and does a bitwise negation operation on it. The result of this operation behaves as follows:

> >     0101    (expression)
> >     ----
> >     1010    (result)

> Any digit that is a 1 in the expression becomes a 0 in the result. Any digit that is a 0 in the expression becomes a 1 in the result.

© 1998 Microsoft Corporation. All rights reserved. Terms of Use.