10%0 结果为NaN？

Question

任何数取余0，为什么结果为NaN；10 % 0;> NaN感谢各位的解答，我觉得还是有些欠妥当。都知道 任何数 /0 得到的是 Infinity 无穷大的，虽然 %0的计算过程中也涉及除法运算，但是它的结果却是NaN 而不是 Infinity；本质上是有区别的，javascript指南中提到： 算术运算中使用了不恰当的的操作数，导致【运算失败】，该运算就会返回 NaN 。然而 任何数 /0 返回的是 Infinity，这代表的是运算是 【成功】 的。所以我觉得最终返回的 NaN 还是有某个地方的运算是有问题的。比如我们都知道 'a'/10 ,结果是NaN，因为一个字符，一个是数字，报错是理所当然的。但是 10%0 为何报错为NaN?

Answer 1

这种问题你想知道结果，只能去看ECMAScript 标准，因为一个取模(余数）运算的定义里，小学生都知道被除数需要是非0，对于这种情况如何处理？当然是标准说怎么处理，就怎么处理
es7标准

找到关于 % opeartor的定义

12.7.3.3 Applying the % Operator：

• If either operand is NaN, the result is NaN.

• The sign of the result equals the sign of the dividend.

• If the dividend is an infinity, or the divisor is a zero, or both, the result is NaN.

• If the dividend is finite and the divisor is an infinity, the result
  equals the dividend.

If the dividend is a zero and the divisor is nonzero and finite, the result is the same as the dividend. In the remaining cases, where neither an infinity, nor a zero, nor NaN is involved, the floating-point remainder r from a dividend n and a divisor d is defined by the mathematical relation r = n - (d × q) where q is an integer that is negative only if n/d is negative and positive only if n/d is positive, and whose magnitude is as large as possible without exceeding the magnitude of the true mathematical quotient of n and d. r is computed and rounded to the nearest representable value using IEEE 754-2008 round to nearest, ties to even mode.

看我加粗的那句话，这就不需要我翻译了吧。。