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JavaScript

Posted by Erik Nilsen
Erik Nilsen
20,433 Points

Bummer! No variable named "circumference" has been defined?

Working on challenge task 1 of 4 on "The Math Object". Every time I try-

var circumference=

i get the error:

"Bummer! No variable named "circumference" has been defined. Make sure to declare the variable like: var circumference =..."

I have even tried copying and pasting, but nothing is working.

Thanks!

4 Answers

Andrew Chalkley
STAFF
Andrew Chalkley
Treehouse Guest Teacher
Andrew Chalkley
Andrew Chalkley
Treehouse Guest Teacher

Hey there,

In your email it said you were doing Math.PI (diameter) however PI is a property not a method on the Math object - look in this video http://teamtreehouse.com/library/javascript-foundations/numbers/the-math-object at 6:20.

Hope that helps :)

Erik Nilsen
Erik Nilsen
20,433 Points

Thanks! i figured it out. I have no idea why it was taking me so long to get it. :P

James Lister
James Lister
6,569 Points
James Lister
James Lister
6,569 Points

I can't seem to get past here. I've been trying various combinations of the following;

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 = Math.pi *diameter;

Where am I going wrong?

James Lister
James Lister
6,569 Points
James Lister
James Lister
6,569 Points

Tried this to;

var circumference = 2 * Math.pi * (diameter/2);

I think I'm missing the point

James Lister
James Lister
6,569 Points
James Lister
James Lister
6,569 Points

Never Mind, I got it Math.PI (pi must be in caps)