& Operator

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Description

Used to perform a bitwise AND on two expressions.

Syntax

result = expression1 & expression2

The & operator syntax has these parts:

Part	Description
result	Any variable.
expression1	Any expression.
expression2	Any expression.

Remarks

The & operator looks at the binary representation of the values of the two expressions and does a bitwise and operation on them. The result of this operation behaves like this:

0101    (expression1)
1100    (expression2)
----
0100    (result)

Any time both of the expressions have a 1 in a digit, the result will have a 1 in that digit. Otherwise, the result will have a 0 in that digit.

As for all bitwise operators, JScript will generate runtime errors for every case in the table below where an E is indicated:

	obj	as	ns	num	bool	undef	null
obj	N	E	N	N	N	E	E
as	E	E	E	E	E	E	E
ns	N	E	N	N	N	E	E
num	N	E	N	N	N	E	E
bool	N	E	N	N	N	E	E
undef	E	E	E	E	E	E	E
null	E	E	E	E	E	E	E

obj = Object, as = Alphanumeric String, ns = Numeric String, num = Number, bool = Boolean, undef = Undefined, null = Null value.