# Luhn

**URL:** <https://www.ruby-forum.com/t/luhn/192796>\
**Category:** Ruby\
**Created:** [August 5, 2010, 6:06pm UTC](https://www.ruby-forum.com/t/luhn/192796 "2010-08-05T18:06:59Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![usmanhhussain](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/u/5fc32e/32.png) [@usmanhhussain](https://www.ruby-forum.com/u/usmanhhussain)\
**Post date:** [August 5, 2010, 6:06pm UTC](https://www.ruby-forum.com/t/luhn/192796/1 "2010-08-05T18:06:59Z")

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Hi Guys,

Has anyone used the Luhn Algorithm before?

I need to write some ruby code to generate random card details but as my  
ruby isnt to great im a bit stuck.

i have the code written by a previous developer in Python BUT i need to  
convert it to ruby. does anyone know how to do this?

kind regards,  
usman h hussain

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**Author:** ![usmanhhussain](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/u/5fc32e/32.png) [@usmanhhussain](https://www.ruby-forum.com/u/usmanhhussain)\
**Post date:** [August 5, 2010, 6:20pm UTC](https://www.ruby-forum.com/t/luhn/192796/2 "2010-08-05T18:20:06Z")

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On Thu, Aug 5, 2010 at 9:07 AM, Usman H. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
wrote:

> Has anyone used the Luhn Algorithm before?
> 
> I need to write some ruby code to generate random card details but as my  
> ruby isnt to great im a bit stuck.

"There’s A Gem For That"™ 🙂

Google `ruby gem Luhn`