I'm following some Javascript good practices and I have a doubt about how to initialize numbers.

Reading some articles I found those examples of variable initialization:

```
var name = '';
var price = 0;
var car = {};

```

The problem: I have a variable called productCode where I will store a number witch 5 characters Ex.: 22738.
Each productCode represents a product like: 

Code: 11234 Product: T-Shit

Code: 12344 Product: Shoes

Should I initizlize productCode variable with zero or what?

Thank you.