Microsoft JScript
~ Operator |
Language Reference
Version 1 |

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

result=~expressionThe

~operator syntax has these parts:

PartDescriptionresultAny variable. expressionAny expression.

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

- If applied to undefined or
nullexpressions, 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.

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