# Right Shift Assignment Operator (>>=) (JavaScript)

Right shifts the value of a variable by the number of bits specified in the value of an expression, maintaining the sign, and assigns the result to the variable.

## Syntax

```
result >>= expression
```

## Parameters

*result*

Any variable.

*expression*

Any expression.

## Remarks

Using the **>>=** operator is exactly the same as specifying:

```
result = result >> expression
```

The **>>=** operator shifts the bits of *result* right by the number of bits specified in *expression*. The sign bit of *result* is used to fill the digits from the left. Digits shifted off the right are discarded. For example, after the following code is evaluated, *temp* has a value of -4: 14 (11110010 in binary) shifted right two bits equals -4 (11111100 in binary).

```
var temp
temp = -14
temp >>= 2
```

## 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 Left Shift Operator (<<)

Bitwise Right Shift Operator (>>)

Unsigned Right Shift Operator (>>>)

Operator Precedence

Operator Summary (JavaScript)