An EAN-13 is the European analogue to the 12-digit Universal Price Code (UPC) found on most American consumer products. An EAN-13 starts with a two-digit number that identifies the country or region numbering authority that issued it, whereas a UPC begins with one digit.
Otherwise, the formats are the same.
An EAN-13 also contains a five-digit manufacturer code, a five-digit product code and a check digit. This last digit is calculated according to an algorithm and serves to validate an EAN-13.
Calculating the check digit manually can be tedious, but is nonetheless simple.
Write down an EAN-13. For example, 5010017088439 is the EAN-13 from a European consumer product.