Bitwise NOT Operator (~) (JavaScript)
Performs a bitwise NOT (negation) on an expression.
result = ~ expression
All unary operators, such as the ~ operator, evaluate expressions as follows:
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If applied to undefined or null expressions, a run-time error is raised.
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Objects are converted to strings.
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Strings are converted to numbers if possible. If not, a run-time error is raised.
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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.
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.
The following example illustrates use of the bitwise NOT (~) operator.
var temp = ~5;
The resulting value is -6, as shown in the following table.
Expression | Binary value (two's complement) | Decimal value |
|---|---|---|
5 | 00000000 00000000 00000000 00000101 | 5 |
~5 | 11111111 11111111 11111111 11111010 | -6 |
Supported in the following document modes: Quirks, Internet Explorer 6 standards, Internet Explorer 7 standards, Internet Explorer 8 standards, Internet Explorer 9 standards, Internet Explorer 10 standards. Also supported in Windows Store apps. See Version Information.
