bitwise and assignment
Summary
Sets the result of a bitwise AND operation on the value of a variable and the value of an expression. The variable and the expression are treated as 32-bit integers.
Syntax
result &= expression
- result
- Any variable.
- expression
- Any expression.
Examples
Using this operator is the same as specifying result = result & expression
The Bitwise AND Operator (&) looks at the binary representation of the values of result and expression and does a bitwise AND operation on them. The output of this operation behaves such that any time both of the expressions have a 1 in a digit, the result has a 1 in that digit; otherwise, the result has a 0 in that digit.
// 9 is 00000000000000000000000000001001
var expr1 = 9;
// 5 is 00000000000000000000000000000101
var expr2 = 5;
// 1 is 00000000000000000000000000000001
expr1 &= expr2;
document.write(expr1);
// result: 1
See also
Other articles
Attributions
Microsoft Developer Network: Article