Performs a bitwise NOT (negation) on an expression.
result = ~ expression
- Any variable.
- Any expression.
See Remarks for explanation
var temp = ~5; //result is -6
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.
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|
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