title: Why is Javascript's MAX_VALUE an "approximate" according to ECMA
body: <blockquote>
    <p>The value of Number.MAX_VALUE is the largest positive finite value of
    the Number type, which is <strong>approximately</strong> 1.7976931348623157 × 10<sup>308</sup>.</p>
  </blockquote>
  
  <p><a href="http://www.ecma-international.org/ecma-262/5.1/#sec-15.7.3.2" rel="nofollow noreferrer">Source</a></p>
  
  <p>Why "approximately"? Can we not know for sure that this is indeed the maximum positive numeric value?
  The answers in <a href="https://stackoverflow.com/questions/307179/what-is-javascripts-max-int-whats-the-highest-integer-value-a-number-can-go-t">this</a> question seem to prove this quite well. Or does approximate mean something different in this context?</p>