-
Notifications
You must be signed in to change notification settings - Fork 22.4k
/
index.md
59 lines (39 loc) · 1.3 KB
/
index.md
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
---
title: Multiplication assignment (*=)
slug: Web/JavaScript/Reference/Operators/Multiplication_assignment
page-type: javascript-operator
browser-compat: javascript.operators.multiplication_assignment
---
{{jsSidebar("Operators")}}
The **multiplication assignment (`*=`)** operator performs [multiplication](/en-US/docs/Web/JavaScript/Reference/Operators/Multiplication) on the two operands and assigns the result to the left operand.
{{EmbedInteractiveExample("pages/js/expressions-multiplication-assignment.html")}}
## Syntax
```js-nolint
x *= y
```
## Description
`x *= y` is equivalent to `x = x * y`, except that the expression `x` is only evaluated once.
## Examples
### Multiplication assignment using numbers
```js
let bar = 5;
bar *= 2; // 10
```
Other non-BigInt values are coerced to numbers:
```js
let bar = 5;
bar *= "foo"; // NaN
```
### Multiplication assignment using BigInts
```js
let foo = 3n;
foo *= 2n; // 6n
foo *= 1; // TypeError: Cannot mix BigInt and other types, use explicit conversions
```
## Specifications
{{Specifications}}
## Browser compatibility
{{Compat}}
## See also
- [Assignment operators in the JS guide](/en-US/docs/Web/JavaScript/Guide/Expressions_and_operators#assignment_operators)
- [Multiplication (`*`)](/en-US/docs/Web/JavaScript/Reference/Operators/Multiplication)