javascript - 根据 ECMA，为什么 Javascript 的 MAX_VALUE 是 "approximate"

Question

The value of Number.MAX_VALUE is the largest positive finite value of the Number type, which is approximately 1.7976931348623157 × 10³⁰⁸.

Source

为什么是“大约”？难道我们不能确定这确实是最大的正数值吗？ this中的答案问题似乎很好地证明了这一点。或者近似值在这种情况下意味着不同的东西？

Answer 1

MAX_VALUE 的准确值为:

179,769,313,486,231,570,814,527,423,731,704,356,798,070,567,525,
844,996,598,917,476,803,157,260,780,028,538,760,589,558,632,766,
878,171,540,458,953,514,382,464,234,321,326,889,464,182,768,467,
546,703,537,516,986,049,910,576,551,282,076,245,490,090,389,328,
944,075,868,508,455,133,942,304,583,236,903,222,948,165,808,559,
332,123,348,274,797,826,204,144,723,168,738,177,180,919,299,881,
250,404,026,184,124,858,368

除了“大约 1.7976931348623157 × 10³⁰⁸”，这对您还有什么意义吗？