Math::N...Product(3)

💖 Math::NumSeq::DigitProduct 💖

okay bestie so this is a page from the User Contributed Perl Documentation manual, and it's all about Math::NumSeq::DigitProduct — the product of digits. yes, that's the whole vibe. multiplication, but make it digits. 🎀

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✨ NAME ✨

Math::NumSeq::DigitProduct — product of digits. literally what it says on the tin, no cap.

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🦋 SYNOPSIS 🦋

use Math::NumSeq::DigitProduct;
my $seq = Math::NumSeq::DigitProduct->new (radix => 10);
my ($i, $value) = $seq->next;

that's it, that's the whole glow-up. you use it, you build it, you call next and it hands you $i and $value like a little gift. 🫶

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🌸 DESCRIPTION 🌸

so the sequence is the products of the digits of i. classic. for example at i=456 the value is 4*5*6=120. math girlies rise 💅

and i=0? okay so it gets treated as a single digit 0, so its product is 0. not a bug, just the rule. periodt.

now for binary (radix => 2) it's a whole different story — the digits are all just 0 or 1, which means the product is 1 for numbers 0b1, 0b11, 0b111, etc, aka 2**k-1... or 0 otherwise. so it's giving "ones or nothing." iconic behaviour honestly. 🔥

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🧚 FUNCTIONS 🧚

heads up bestie — see "FUNCTIONS" in Math::NumSeq for the behaviour that's common to all sequence classes. shared lore, iykyk.

• "$seq = Math::NumSeq::DigitProduct->new ()"
• "$seq = Math::NumSeq::DigitProduct->new (radix => $r)" — create and return a shiny new sequence object ✨ the default radix is 10, ie. decimal, or you can pass a radix parameter if you're feeling spicy.

🎀 Random Access 🎀

• "$value = $seq->ith($i)" — return the product of the digits of $i. just... hand it an $i, get the product. simple as.
• "$bool = $seq->pred($value)" — returns true if $value is the product of some set of digits. meaning: its factors (prime factors, bestie, we're talking prime) are all less than the radix, since nothing bigger can occur. the math is mathing 💜

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🌈 SEE ALSO 🌈

• Math::NumSeq
• Math::NumSeq::DigitLength
• Math::NumSeq::DigitSum

the whole friend group. go say hi. 🫶

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👑 HOME PAGE 👑

<http://user42.tuxfamily.org/math-numseq/index.html>

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💀 LICENSE 💀

Copyright 2011, 2012, 2013, 2014, 2016, 2019, 2020 Kevin Ryde

Math-NumSeq is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version.

Math-NumSeq is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with Math-NumSeq. If not, see <http://www.gnu.org/licenses/>.

okay so lowkey that warranty part is the serious one — no promises, no guarantees, read the license fr fr. 📜

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aaaand that's the whole page bestie, we ate 💅✨ this one's from perl v5.42.0, dated 2025-07-25, so it's fresh-ish, and it's been a whole journey. mwah, go multiply some digits. 🎀🦋💖