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JavaScript JavaScript Basics (Retired) Working With Numbers Numbers and Strings

DeMarco Spears
DeMarco Spears
1,342 Points
Posted by DeMarco Spears
DeMarco Spears
1,342 Points

The value of `totalWidth` is NaN, but it should be 1900. Did you multiply the width by the `numOfDivs` variable?

someone help

app.js 
var width = '190px';
var numOfDivs = 10;
var totalWidth = width * numOfDivs;
parseInt(width);
document.write(totalWidth);
index.html 
<!DOCTYPE HTML>
<html>
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <title>JavaScript Basics</title>
</head>
<body>
<script src="app.js"></script>
</body>
</html>

2 Answers

Jennifer Nordell
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STAFF
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher
Jennifer Nordell
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher

Hi there, DeMarco Spears! First, you're doing great. You've clearly understood that you need to parse that string into an integer to use it. The problem comes in the order here. You call parseInt on width after you've already tried to use it. The easiest way to fix this is to parse it on the same line where you're doing the calculation:

var totalWidth = parseInt(width) * numOfDivs;

This will turn that string "190px" into just a plain old number 190 so that you can then multiply it.

Hope this helps! :sparkles: