乘法(*)
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
乘法(*
)运算符计算操作数的乘积。
尝试一下
console.log(3 * 4);
// Expected output: 12
console.log(-3 * 4);
// Expected output: -12
console.log("3" * 2);
// Expected output: 6
console.log("foo" * 2);
// Expected output: NaN
语法
js
x * y
示例
数值乘法
js
2 * 2; // 4
-2 * 2; // -4
与 Infinity 相乘
js
Infinity * 0; // NaN
Infinity * Infinity; // Infinity
非数值乘法
js
"foo" * 2; // NaN
规范
Specification |
---|
ECMAScript® 2025 Language Specification # sec-multiplicative-operators |
浏览器兼容性
Report problems with this compatibility data on GitHubdesktop | mobile | server | ||||||||||||
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Multiplication ( * ) |
Legend
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- Full support
- Full support
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.