https://github.com/ulikunitz/damm

Golang package for computing a decimal check digit
https://github.com/ulikunitz/damm

Last synced: 11 days ago
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Golang package for computing a decimal check digit

• Host: GitHub
• URL: https://github.com/ulikunitz/damm
• Owner: ulikunitz
• License: bsd-2-clause
• Created: 2015-01-02T22:40:19.000Z (about 10 years ago)
• Default Branch: master
• Last Pushed: 2020-12-31T14:16:41.000Z (about 4 years ago)
• Last Synced: 2024-12-03T16:56:08.074Z (2 months ago)
• Language: Go
• Homepage:
• Size: 4.88 KB
• Stars: 3
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Package damm

The Go language package damm computes a check digit for a string of

decimal digits. It uses an algorithm proposed by H. Michael Damm in

2004.

## Examples

The function CheckDigit computes and returns it as string.

    c, err := CheckDigit("12345678901")

The argument must contain only decimal digits. Otherwise an error is

reported.

The function Validate verifies digits with the check digit appended.

    ok := Validate("123456789018")

The function returns true if the argument contains only decimal digits and

the appended check digit is correct.

## Algorithm

More information about the algorithm can be found in Wikipedia.

http://en.wikipedia.org/wiki/Damm_algorithm