Check Digits - bwipp/postscriptbarcode GitHub Wiki

Generate check digit(s) for symbologies where the use of check digits is optional.

Calculate the optional check characters of this Code 93 symbol:

Data:    CHECK ME OUT
Options: includecheck
Encoder: code93

Show the calculated check digit in the human readable text.

• For barcode symbologies where the check digit is not mandatory, this option must be used in combination with includecheck.
• If any part of the checksum does not have a printable representation then that part is not displayed.

Display the check digit of this Royal Mail barcode:

Data:    LE28HS9Z
Options: includetext includecheckintext
Encoder: royalmail