Right shift assignment (>>=)

The right shift assignment (>>=) operator performs 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#

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
• Right shift (>>)