/* Get Programming with JavaScript

 * Listing 2.09

 * Valid and invalid variable names

 */

​

var thisIsFine;

var $noProblemHere;

var _underscore56;

var StartWithCapital;

var z5;

​

var 999;

var 39Steps;

var &nope;

var single words only;

var yield;

​

​

​

/* Further Adventures

 *

 * 1) Take a look at the errors in the

 *    error section of JS Bin below.

 *

 * 2) Click Run in the console

 *    and see what errors appear there.

 *

 * 3) Delete the second block of variables

 *    one by one from the code.

 *    See how the errors change.

 *

 */