How Barcode Scanners Work

How Do Barcode Represents The Number 0 - 9?

Each digit in the product number is given the same horizontal space of exactly 7 units. The 7 units are colored with a different pattern of black and white stripes.

For example, number one is represented by 2 white stripes, 2 black stripes, 2 white stripes and 1 black stripe. Number two is represented by 2 white stripes, 1 black stripe, 2 white stripes and 2 black stripes.