Bitwise AND assignment (&=)

The bitwise AND assignment (&=) operator uses the binary representation of both operands, does a bitwise AND operation on them and assigns the result to the variable.

Try it

Syntax

x &= y // x = x & y

Examples

Using bitwise AND assignment

let a = 5;
// 5:     00000000000000000000000000000101
// 2:     00000000000000000000000000000010
a &= 2; // 0

Specifications

Specification
ECMAScript Language Specification
# sec-assignment-operators

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See also