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JavaScript JavaScript Basics (Retired) Working With Numbers Using Math Methods

Shaun Wetzel
Shaun Wetzel
9,085 Points
Posted by Shaun Wetzel
Shaun Wetzel
9,085 Points

Help with Math.floor()

completed task one, went onto task to and repeated basically what I did in task one except this time it asked to round down to the nearest integer with Math.floor(). I went on to do so and after pressing check work it tells me I need to have my 'Math.floor()' look like 'Math.floor(temperature)' which I did. I don't see what I did wrong.

script.js 
var temperature = 37.5
temperature = Math.round(temperature);
alert(temperature);
temperature = Math.floor(temperature);
alert(temperature);
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="script.js"></script>
</body>
</html>

1 Answer

David Kaneshiro Jr.
David Kaneshiro Jr.
29,247 Points
David Kaneshiro Jr.
David Kaneshiro Jr.
29,247 Points

What happened was that you saved the value returned from Math.round() to the original temperature variable, which means that the value in temperature is 38 after using Math.round(). So when you used temperature again as a parameter in Math.floor() you were rounding the value of 38 instead of the original value of 37.5.

Shaun Wetzel
Shaun Wetzel
9,085 Points
Shaun Wetzel
Shaun Wetzel
9,085 Points

Thank you that makes a lot of sense now!