result

Any numeric variable.

expression

Any numeric expression.

Using this operator is almost the same as specifying result = result & expression, except that result is only evaluated once.

The &= operator coerces the arguments to matching data types. Then 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:

В	Copy Code
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.

Version 1

Reference

Concepts