Right shift assignment (>>=)
{{jsSidebar("Operators")}}
The right shift assignment (>>=) operator performs right shift on the two operands and assigns the result to the left operand.
{{InteractiveExample("JavaScript Demo: Expressions - Right shift assignment operator")}}
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
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}}