What is meaning of useing (-Infinity, Infinity) in sorting

Question

function myFunction(arr) {<br>
var len = arr.lenght;<br>
var max = -Infinity;<br>
while(len--) {<br>
&nbsp;&nbsp; if(arr[len] &gt; max) {<br>
<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; max = arr[len];<br>
&nbsp;&nbsp;&nbsp; }<br>
}<br>
&nbsp; return max;<br>
}

Answer 1

The code you attached is not readable, invalid JavaScript code (probably copy-pasted from somewhere).
It is better to save your program in the web playground, and provide a link with "Insert code" feature.
-Infinity might be used in this snippet to represent a number that is smaller than any other number. So that the algorithm is always able to do a meaningful comparison on all elements of the list, and always return a result.