相除運算子(/)
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.
相除運算子(/
)是用來將兩個值進行相除並取得其商數。其中左運算元是被除數;右運算元是除數。
嘗試一下
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
語法
js
x / y
範例
基本的除法
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
規範
Specification |
---|
ECMAScript® 2025 Language Specification # sec-multiplicative-operators |
瀏覽器相容性
Report problems with this compatibility data on GitHubdesktop | mobile | server | ||||||||||||
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Division ( / ) |
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.