CHECKDIGITS(1)

📦
version 1.3.6 · 3 versions
, in fedora 43

💖 CHECKDIGITS 💖

okay bestie, welcome to the checkdigits manual page, from the User Contributed Perl Documentation collection ✨

🌸 NAME 🌸

checkdigits — check or generate check digits 💅

🎀 VERSION 🎀

This document describes checkdigits v1.3.3. yes, we're on v1.3.3, write it down, it's giving iconic 💖

🦋 SYNOPSIS 🦋

like, here's the whole vibe in one code block:

checkdigits [Options] command [[number] ...]

options:

 -algorithm alg - use this algorithm

commands:

 check           - check validity of number containing checkdigit
 checkdigit      - return checkdigit belonging to number
 complete        - return number completed with checkdigit
 list_algorithms - list all known algorithms
 describe        - describe the given algorithms

no cap, that's the whole thing 🫶

🌈 DESCRIPTION 🌈

So basically this is a command line program, and it can compute any checkdigit known by the perl module Algorithm::CheckDigits. literally any one. the whole roster. it's giving encyclopedia energy but make it checkdigits 💫

✨ OPTIONS AND COMMANDS ✨

💜 Options

  • -algorithm alg — compute checkdigits according to algorithm alg. And here's the lil secret bestie: instead of passing the algorithm with this option, you can also rename the program to the name of the algorithm, or to checkdigits- followed by the name of the algorithm. multiple routes, same destination, main character behaviour 👑
okay but listen — you must provide the algorithm by one of these means, or the program will not compute any checkdigit. like, at all. zero. nada. 🚫

🍓 Commands

  • check — check validity of number containing checkdigit.
  • checkdigit — return checkdigit belonging to number.
  • complete — when you call the program with this command, it takes the number, computes the appropriate checkdigits, and returns the complete number with checkdigits. so the number arrives, gets its lil checkdigit glow-up, and leaves complete 💅
  • describe — called with this command, the program lists the algorithm handles you gave on the command line, each with a short description, or the word unknown for any unknown algorithm. and if you want the full list of known algorithms, go see the list_algorithms command. iykyk 🔍
  • list_algorithms — called with this command, the program lists all known algorithms together with a short description, and then exits. that's it, that's the whole job, and honestly? ate 🎀

💀 DIAGNOSTICS 💀

(nothing here bestie, this section is empty in the original, we move 🫶)

🧚 CONFIGURATION AND ENVIRONMENT 🧚

At the moment the program doesn't recognise any environment variables. not one. zero env vars, it simply does not know them 🙈

The algorithm to use may be predefined by renaming the program to the name of the algorithm, or to checkdigits- followed by the name of the algorithm. so like, rename it and the algorithm is just... decided for you. iconic shortcut honestly ✨

👑 AUTHOR 👑

Mathias Weidner mamawe@cpan.org 💖

Copyright (c) 2010-2020, Mathias Weidner mamawe@cpan.org. All rights reserved.

This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See perlartistic. 🦋

🚨 DISCLAIMER OF WARRANTY 🚨

okay this part is in ALL CAPS in the original and it's ALL CAPS for a reason bestie, read it:

BECAUSE THIS SOFTWARE IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE SOFTWARE, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE SOFTWARE "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE SOFTWARE IS WITH YOU. SHOULD THE SOFTWARE PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR, OR CORRECTION.

IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE SOFTWARE AS PERMITTED BY THE ABOVE LICENCE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE SOFTWARE (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE SOFTWARE TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

fr fr, no warranty, use at your own risk, that's the whole mood 😭

and that's a wrap bestie 🫶 this page was brought to you by perl v5.42.0, dated 2025-07-25, and it lives in section 1 of the manual. go check those digits, queen 💅✨

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