除法（/）

¥Syntax

x / y

¥Description

/ 运算符针对两种类型的操作数进行重载：编号和 BigInt。它首先 将两个操作数强制转换为数值 并测试它们的类型。如果两个操作数都变成 BigInt，则执行 BigInt 除法；否则，执行数字除法。如果一个操作数变为 BigInt 而另一个操作数变为数字，则抛出 TypeError。

¥The / operator is overloaded for two types of operands: number and BigInt. It first coerces both operands to numeric values and tests the types of them. It performs BigInt division if both operands become BigInts; otherwise, it performs number division. A TypeError is thrown if one operand becomes a BigInt but the other becomes a number.

对于 BigInt 除法，结果是将两个操作数的商截断为零，余数被丢弃。如果除数 y 是 0n，则抛出 RangeError。这是因为数字除以零会返回 Infinity 或 -Infinity，但 BigInt 没有无穷大的概念。

¥For BigInt division, the result is the quotient of the two operands truncated towards zero, and the remainder is discarded. A RangeError is thrown if the divisor y is 0n. This is because number division by zero returns Infinity or -Infinity, but BigInt has no concept of infinity.

¥Examples

¥Division using numbers

1 / 2; // 0.5
Math.floor(3 / 2); // 1
1.0 / 2.0; // 0.5

2 / 0; // Infinity
2.0 / 0.0; // Infinity, because 0.0 === 0
2.0 / -0.0; // -Infinity

其他非 BigInt 值被强制转换为数字：

¥Other non-BigInt values are coerced to numbers:

5 / "2"; // 2.5
5 / "foo"; // NaN

¥Division using BigInts

1n / 2n; // 0n
5n / 3n; // 1n
-1n / 3n; // 0n
1n / -3n; // 0n

2n / 0n; // RangeError: BigInt division by zero

你不能在除法中混合 BigInt 和数字操作数。

¥You cannot mix BigInt and number operands in division.

2n / 2; // TypeError: Cannot mix BigInt and other types, use explicit conversions
2 / 2n; // TypeError: Cannot mix BigInt and other types, use explicit conversions

要使用 BigInt 和非 BigInt 进行除法，请转换任一操作数：

¥To do division with a BigInt and a non-BigInt, convert either operand:

2n / BigInt(2); // 1n
Number(2n) / 2; // 1

¥See also

• 添加 (+)
• 减法（-）
• 乘法（*）
• 余数 (%)
• 求幂 (**)
• 增量 (++)
• 递减 (--)
• 一元否定 (-)
• 一元加 (+)