Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

JavaScript JavaScript Foundations Numbers The Math Object

Posted by layeesolo
layeesolo
7,316 Points

Math.floor

How do I solve this Math.floor problem? The question is there is a variable "ageIfILiveToYear2100" already defined but it has a lot of decimal places. Create a variable name "age" and use the Math.floor method to lop off the decimal digits. I have tried but is not working for me.

index.html 
<!DOCTYPE html>
<html lang="en">
  <head>
    <title>JavaScript Foundations: The Math Object</title>
    <link rel="stylesheet" href="core.css">
    <script>
      var diameter = 5.75,
          a = 17,
          b = 42,
          c = 1337,
          ageIfILiveToYear2100 = (new Date(2100, 0, 1) - new Date(1995, 5, 16, 7, 20)) / (1000 * 60 * 60 * 24 * 365.242);

      var circumference= diameter * Math.PI;
      console.log(circumference);

      var chance=Math.floor(Math.random()*20 + 0);
       console.log(chance);

      var maxWidth= Math.max(c,b);
       console.log(maxWidth);

      var age = Math.floor() + ageIfILiveToYear2100;


      /*
      The JavaScript Math object has the following
      constant (among others):
      Math.PI
          Approximately 3.14159. Pi (π) is used
          to determine the circumference of a circle
          given its diameter by multiplying the diameter
          by π. Geometery refresher: the circumference
          of a circle is the distance around the outside
          edge. The diameter is the width of the circle.

      The JavaScript Math object also has the following
      methods (among others):
      Math.random()
          Returns a random number between 0 and 1
      Math.max(a, b, ...)
          Returns the largest value of the passed
          arguments
      Math.floor(a)
          Returns the value of a number rounded down to
          the nearest integer
      */



    </script>
  </head>
  <body>
    <h1>JavaScript Foundations</h1>
    <h2>The Math Object</h2>
    <script src="viewer.js"></script>
  </body>
</html>

4 Answers

mikes02
mikes02
Courses Plus Student 16,968 Points

You're close, you wouldn't add the variable ageIfILiveToYear2100 to Math.floor, you would pass it in to the Math.floor function, like so:

var age = Math.floor(ageIfILiveToYear2100);
layeesolo
layeesolo
7,316 Points
layeesolo
layeesolo
7,316 Points

I tried it ,but is not working still.

mikes02
mikes02
Courses Plus Student 16,968 Points

Can you post the code you tried please?

mikes02
PLUS
mikes02
Courses Plus Student 16,968 Points
mikes02
mikes02
Courses Plus Student 16,968 Points

I think your maxWidth is off, too, this passes for the maxWidth variable challenge:

var maxWidth= Math.max(a,b,c);

and this passes: for the age variable challenge:

var age = Math.floor(ageIfILiveToYear2100);
layeesolo
layeesolo
7,316 Points
layeesolo
layeesolo
7,316 Points

thanks mike again. I appreciate your help. I find my error