7.4.8 &= Operator

Used to perform a bitwise AND on an expression
Syntax
result &= expression
Arguments
- 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 result and expression have a 1 in a digit, result will have a 1 in that digit, otherwise result will have a 0 in that digit.
For information on when a run-time error is generated by the &= operator, see the Operator Behavior table.
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