User talk:Cipher821

Welcome!

Hello, Cipher821, and welcome to Wikipedia! Thank you for your contributions. I hope you like the place and decide to stay. Here are some pages that you might find helpful:

I hope you enjoy editing here and being a Wikipedian! Please sign your messages on discussion pages using four tildes (~~~~); this will automatically insert your username and the date. If you need help, check out Wikipedia:Questions, ask me on my talk page, or ask your question on this page and then place {{help me}} before the question. Again, welcome!--MollyPollyRolly (talk) 06:07, 4 August 2021 (UTC)[reply]

Tone (literature)

Hey Cipher821. I noticed you added a hatnote to Tone (literature), but I reverted it. This is because article space (the part that Wikipedia readers see) is reader facing, or meant to appeal to readers not editors.

Also, next time you add a hatnote, use a template like Template:Hatnote. This will suppress the hatnote showing up in article previews. Sungodtemple (talk) 18:25, 6 August 2021 (UTC)[reply]

I see, thank you.Cipher821 (talk) 01:11, 9 August 2021 (UTC)[reply]

Luhn algorithm

Hello Cipher821!

I noticed you made the following edit to Luhn algorithm: https://en.wikipedia.org/w/index.php?title=Luhn_algorithm&diff=prev&oldid=1139089224. I changed it back because your reasoning is false.

Yes, 2*5%10=0 and 2*0%10=0, but that's not what the checksum of this algorithm cares about.

It takes the sum of the digits and not of the products itself, which is explained here: https://en.wikipedia.org/wiki/Luhn_algorithm#Example_for_computing_check_digit. That's 1 for 2*5=10 and 0 for 2*0=0. That gets reflected in the checksum correctly and thus in the check digit.

I noticed this because the German version doesn't mention this weakness.

Cheers! Jackylein250 (talk) 13:14, 5 April 2023 (UTC)[reply]