2/14 Reference Error


#1

Hey there, I'm stuck at 2/14:

var isEven = function(number) {
// Your code goes here!
if(number % 2 === 0)
{
      return true;
  }
  else if(isNan(number))
  {
      console.log("This is not a number at all.");
  }
  else
  {
      return false;
  }
}

And all it returns is:

ReferenceError: isNan is not defined

#2

Oh, never mind. It was a simple syntax error.
Well, sorry.


#3

supposed to be isNaN