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Right shift assignment (>>=)

The >>= operator performs right shift on the two operands and assigns the result to the left operand.

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Syntax

js
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

Specification
ECMAScript Language Specification
# sec-assignment-operators

Browser compatibility

Desktop Mobile Server
Chrome Edge Firefox Opera Safari Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet WebView Android Deno Node.js
Right_shift_assignment 1 12 1 3 1 18 4 10.1 1 1.0 4.4 1.0 0.10.0

See also

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Right_shift_assignment