# 10.to\_hex?

**URL:** <https://www.ruby-forum.com/t/10-to-hex/82855>\
**Category:** Ruby\
**Created:** [November 19, 2005, 3:35am UTC](https://www.ruby-forum.com/t/10-to-hex/82855 "2005-11-19T03:35:31Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![uval](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/u/49beb7/32.png) [@uval](https://www.ruby-forum.com/u/uval)\
**Post date:** [November 19, 2005, 3:35am UTC](https://www.ruby-forum.com/t/10-to-hex/82855/1 "2005-11-19T03:35:31Z")

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Hello,

I can’t find the function to convert an number to its hex representation  
I feel it must be there …

irb(main):068:0\> Integer.methods.grep /hex/  
=\> []  
irb(main):069:0\> Numeric.methods.grep /hex/  
=\> []

Regards, Daniel

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<div class="post-metadata">

**Author:** ![uval](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/u/49beb7/32.png) [@uval](https://www.ruby-forum.com/u/uval)\
**Post date:** [November 19, 2005, 3:38am UTC](https://www.ruby-forum.com/t/10-to-hex/82855/2 "2005-11-19T03:38:32Z")

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On Sat, Nov 19, 2005 at 11:32:25AM +0900, Daniel Sch?le wrote:

> Hello,
> 
> I can’t find the function to convert an number to its hex representation  
> I feel it must be there …
> 
> irb(main):068:0\> Integer.methods.grep /hex/  
> =\> []  
> irb(main):069:0\> Numeric.methods.grep /hex/  
> =\> []

ri sprintf

Search for ‘hex’.

(x and X)

marcel

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<div class="post-metadata">

**Author:** ![uval](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/u/49beb7/32.png) [@uval](https://www.ruby-forum.com/u/uval)\
**Post date:** [November 19, 2005, 3:44am UTC](https://www.ruby-forum.com/t/10-to-hex/82855/3 "2005-11-19T03:44:33Z")

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10.to\_s(16) #=\> a

class Numeric  
def to\_hex  
to\_s(16)  
end  
end

10.to\_hex #=\> a

On 11/18/05, Daniel Schüle [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> Regards, Daniel

–  
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