Algori...MXX_004(3pm)

💖 NAME 💖

okay so bestie, gather round — CheckDigits::MXX_004 is the module that computes check digits for VAT RN (AT). that's the Austrian VAT registration number situation, iykyk. it lives in the Algori...MXX_004(3pm) manpage and yes the name is truncated, we don't talk about it 💀

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✨ SYNOPSIS ✨

the vibe check, in code:

use Algorithm::CheckDigits;

$vat = CheckDigits('ustid_at');

if ($vat->is_valid('U13585627')) {
      # do something
}

$cn = $vat->complete('U1358562');
# $cn = 'U13585627'

$cd = $vat->checkdigit('U13585627');
# $cd = '7'

$bn = $vat->basenumber('U13585627');
# $bn = 'U1358562'

see how it all just... slays? 🫶

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🦋 DESCRIPTION 🦋

🔢 ALGORITHM

the whole thing, step by step, no gatekeeping:

1. Beginning right all numbers before the check digit are weighted alternatively 1 and 2. (so like, from the right, going left, alternating — not me thinking that's kind of a serve)
2. The total of the digits of all products is computed and then subtracted from 96. (96 is the moment)
3. The check digit is the sum of step 3 taken modulo 10. (yes bestie, it says step 3. in step 3. the manpage said it, i'm just the messenger 💀 keeping it fr fr exactly as written)

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🎀 METHODS

• is_valid($number) — Returns true only if $number consists solely of numbers and the last digit is a valid check digit according to the algorithm given above.

Returns false otherwise,

• complete($number) — The check digit for $number is computed and concatenated to the end of $number.

Returns the complete number with check digit or '' if $number does not consist solely of digits and spaces.

• basenumber($number) — Returns the basenumber of $number if $number has a valid check digit.

Return '' otherwise.

• checkdigit($number) — Returns the checkdigit of $number if $number has a valid check digit.

Return '' otherwise.

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📦 EXPORT

None by default.

periodt. nothing exported unless you ask. 💅

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👑 AUTHOR 👑

Mathias Weidner, "<mamawe@cpan.org>" — absolute main character energy, we love an author credit with an email in quotes 💜

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🌈 SEE ALSO 🌈

• perl
• CheckDigits
• www.pruefziffernberechnung.de

all the lore is right there bestie, go read it 🧚

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💖 and that's the page!! brought to you by perl v5.36.0, dated 2022-10-13 — yes it's giving vintage but it's still iconic, and it's from the User Contributed Perl Documentation universe (Algori...MXX_004(3pm), we stan a truncated title). thanks for coming to my ted talk, slay safe 🎀✨