除算 (/)
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.
除算演算子 (/
) は、左のオペランドを被除数とし、右のオペランドを除数としたオペランド同士の除算結果を生成します。
試してみましょう
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
構文
js
x / y;
例
基本的な除算
js
1 / 2; // 0.5
Math.floor(3 / 2); // 1
1.0 / 2.0; // 0.5
ゼロ除算
js
2.0 / 0; // Infinity
2.0 / 0.0; // Infinity。 0.0 === 0 であるため
2.0 / -0.0; // -Infinity
仕様書
Specification |
---|
ECMAScript® 2025 Language Specification # sec-multiplicative-operators |
ブラウザーの互換性
Report problems with this compatibility data on GitHubdesktop | mobile | server | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Division ( / ) |
Legend
Tip: you can click/tap on a cell for more information.
- 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.