Assignment (=)
The assignment (=) operator is used to assign a value to a
variable. The assignment operation evaluates to the assigned value. Chaining the
assignment operator is possible in order to assign a single value to multiple variables.
Try it
Syntax
js
x = y
Examples
Simple assignment and chaining
js
let x = 5;
let y = 10;
let z = 25;
x = y; // x is 10
x = y = z; // x, y and z are all 25
Value of assignment expressions
The assignment expression itself evaluates to the value of the right-hand side, so you can log the value and assign to a variable at the same time.
js
let x;
console.log(x); // undefined
console.log(x = 2); // 2
console.log(x); // 2
Specifications
| Specification |
|---|
| ECMAScript Language Specification # sec-assignment-operators |
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