# How to Check Decimal in Ruby

**URL:** <https://www.ruby-forum.com/t/how-to-check-decimal-in-ruby/164759>\
**Category:** Ruby\
**Created:** [April 5, 2009, 2:07pm UTC](https://www.ruby-forum.com/t/how-to-check-decimal-in-ruby/164759 "2009-04-05T14:07:25Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![koko](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/ee59a6/32.png) [@koko](https://www.ruby-forum.com/u/koko)\
**Post date:** [April 5, 2009, 2:07pm UTC](https://www.ruby-forum.com/t/how-to-check-decimal-in-ruby/164759/1 "2009-04-05T14:07:25Z")

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Dear all,

I would like to know, how can I check the “Decimal” value (0 to 9) with  
gets  
method, without any converting ruby builtin method.

regards,

Salai.

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**Author:** ![koko](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/k/ee59a6/32.png) [@koko](https://www.ruby-forum.com/u/koko)\
**Post date:** [April 5, 2009, 2:30pm UTC](https://www.ruby-forum.com/t/how-to-check-decimal-in-ruby/164759/2 "2009-04-05T14:30:50Z")

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On 05.04.2009 14:06, Thomas K. wrote:

> I would like to know, how can I check the “Decimal” value (0 to 9) with gets  
> method, without any converting ruby builtin method.

You can use a regular expression.

Kind regards

robert