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---
title: Right shift assignment (>>=)
slug: Web/JavaScript/Reference/Operators/Right_shift_assignment
page-type: javascript-operator
browser-compat: javascript.operators.right_shift_assignment
sidebar: jssidebar
---
The **right shift assignment (`>>=`)** operator performs [right shift](/en-US/docs/Web/JavaScript/Reference/Operators/Right_shift) on the two operands and assigns the result to the left operand.
{{InteractiveExample("JavaScript Demo: Right shift assignment (>>=) operator")}}
```js interactive-example
let a = 5; // 00000000000000000000000000000101
a >>= 2; // 00000000000000000000000000000001
console.log(a);
// Expected output: 1
let b = -5; // 11111111111111111111111111111011
b >>= 2; // 11111111111111111111111111111110
console.log(b);
// Expected output: -2
```
## Syntax
```js-nolint
x >>= y
```
## Description
`x >>= y` is equivalent to `x = x >> y`, except that the expression `x` is only evaluated once.
## Examples
### Using right shift assignment
```js
let a = 5; // (00000000000000000000000000000101)
a >>= 2; // 1 (00000000000000000000000000000001)
let b = -5; // (-00000000000000000000000000000101)
b >>= 2; // -2 (-00000000000000000000000000000010)
let c = 5n;
c >>= 2n; // 1n
```
## Specifications
{{Specifications}}
## Browser compatibility
{{Compat}}
## See also
- [Assignment operators in the JS guide](/en-US/docs/Web/JavaScript/Guide/Expressions_and_operators#assignment_operators)
- [Right shift (`>>`)](/en-US/docs/Web/JavaScript/Reference/Operators/Right_shift)