></p>
<p>你认为你了解JavaScript? 快速的做一下下面的这些题目。并将下面的每一个表达式的值写出。(答案在问题后面)</p>
<p>1. ++Math.PI<br/>
2. (0.1 + 0.2) + 0.3 == 0.1 + (0.2 + 0.3)<br/>
3. typeof NaN<br/>
4. typeof typeof undefined<br/>
5. a = {null:null}; typeof a.null;<br/>
6. a = &#8220;5&#8221;; b = &#8220;2&#8221;; c = a * b;<br/>
7. a = &#8220;5&#8221;; b = 2; c = a+++b;<br/>
8. isNaN(1/null)<br/>
9. (16).toString(16)<br/>
10.016 * 2<br/>
11.~null<br/>
12.&#8221;