除法(/)

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.

除法/)运算符计算两个操作数的商,其中左操作数是被除数,右操作数是除数。

尝试一下

console.log(12 / 2);
// Expected output: 6

console.log(3 / 2);
// Expected output: 1.5

console.log(6 / "3");
// Expected output: 2

console.log(2 / 0);
// Expected output: Infinity

语法

js
x / y

示例

基本除法

js
1 / 2; // 0.5

Math.floor(3 / 2); // 1

1.0 / 2.0; // 0.5

除以零

js
2.0 / 0; // Infinity

2.0 / 0.0; // Infinity, because 0.0 === 0

2.0 / -0.0; // -Infinity

规范

Specification
ECMAScript® 2025 Language Specification
# sec-multiplicative-operators

浏览器兼容性

Report problems with this compatibility data on GitHub
desktopmobileserver
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
Deno
Node.js
Division (/)

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support

参见