Bitwise AND Assignment Operator (&=)

Microsoft Office JScript

Microsoft® JScript® &= Operator  Language Reference 
Version 1 

See Also


Description
Used to perform a bitwise AND on an expression.
Syntax
result &= expression

The &= operator syntax has these parts:

Part Description
result Any variable.
expression Any expression.

Remarks
Using this operator is exactly the same as specifying:
result = result & expression
The &= 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 like this:
0101    (result)
1100    (expression)
----
0100    (output)
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.

For information on when a run-time error is generated by the &= operator, see the Operator Behavior table.