Bitwise XOR assignment (^=)

The bitwise XOR assignment (^=) operator performs bitwise XOR on the two operands and assigns the result to the left operand.

{{InteractiveExample("JavaScript Demo: Bitwise XOR assignment (^=) operator", "shorter")}}

```js interactive-example let a = 5; // 00000000000000000000000000000101 a ^= 3; // 00000000000000000000000000000011

console.log(a); // 00000000000000000000000000000110 // Expected output: 6

## 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 bitwise XOR assignment#

let a = 5; // (00000000000000000000000000000101)
a ^= 3; // (00000000000000000000000000000011)

console.log(a); // 6 (00000000000000000000000000000110)

let b = 5; // (00000000000000000000000000000101)
b ^= 0; // (00000000000000000000000000000000)

console.log(b); // 5 (00000000000000000000000000000101)

let c = 5n;
c ^= 3n;
console.log(c); // 6n

Specifications#

{{Specifications}}

Browser compatibility#

{{Compat}}

See also#

• Assignment operators in the JS guide
• Bitwise XOR (^)