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® 2026 Language Specification # sec-multiplicative-operators |