The standard check digit algorithm for GS1 data structures (including GTIN).
Note: This implementation does not check the length of a number; however, it
is not recommended to use numbers longer than 18 digits because GS1 General
Specifications do not explicitly specify an algorithm for them.
The standard check digit algorithm for GS1 data structures (including GTIN).
Note: This implementation does not check the length of a number; however, it is not recommended to use numbers longer than 18 digits because GS1 General Specifications do not explicitly specify an algorithm for them.