# Bitwise AND Operator (&) (JavaScript)

Performs a bitwise AND operation on two 32-bit expressions.

## Syntax

```
result = expression1 & expression2
```

## Parameters

`result`

The result of the operation.

`expression1`

Any expression.

`expression2`

Any expression.

## Remarks

The `&`

does a bitwise AND operation on the each of the bits of two 32-bit expressions. If both of the bits are 1, the result is 1. Otherwise, the result is 0.

Bit1 | Bit2 | ANDed Value |
---|---|---|

0 | 0 | 0 |

1 | 1 | 1 |

1 | 0 | 0 |

0 | 1 | 0 |

The following examples show how to use the `&`

operator.

```
// 9 is 00000000000000000000000000001001
var expr1 = 9;
// 5 is 00000000000000000000000000000101
var expr2 = 5;
// 1 is 00000000000000000000000000000001
var result = expr1 & expr2;
document.write(result);
// Output: 1
```

## Requirements

Supported in the following document modes: Quirks, Internet Explorer 6 standards, Internet Explorer 7 standards, Internet Explorer 8 standards, Internet Explorer 9 standards, Internet Explorer 10 standards, Internet Explorer 11 standards. Also supported in Store apps (Windows 8 and Windows Phone 8.1). See Version Information.

## See Also

Bitwise AND Assignment Operator (&=)

Operator Precedence

Operator Summary (JavaScript)