math.round vs parseInt
<p>Have a quick JS question. What is the difference between math.round and parseInt? </p>

<p>I made a JS script to sum the inverses of prompted numbers:
        
        </p>

<pre><code>    &lt;script type="text/javascript"&gt;
    var numRep = prompt("How many repetitions would you like to run?");
    var sum = 0; 
    var count = 0;
    var i = 1;     //variable i becomes 1


    while (i &lt;= numRep)  {//  repeat 5 times

       var number = prompt("Please enter a non zero integer");

       if(number==0){
         document.write("Invalid Input &lt;br&gt;");
 count++;
       }
       else{
          document.write("The inverse is: " + 1/number + "&lt;br&gt;");
          sum = sum + (1/parseInt(number));  //add number to the sum
       }

       i++; //increase i by 1
    }

    if (sum==0){
    document.write("You did not enter valid input");}
    else { document.write("The sum of the inverses is: " + sum);  //display sum
    }
    &lt;/script&gt;&lt;/body&gt;&lt;/html&gt;
</code></pre>

<p>and it uses parseInt. If I wanted to makeit use math.round, is there anything else I need to do so that It knows to limit the number of decimal places accordingly?</p>

<p>In other words, does math.round have to be formatted in a certain way?</p>
