Can a native website be converted to mobile web?

[Bile]

Hello every one,
I was assigned to developed a website for My company and all is good by now,only the testing department gave a question
if there is a way I could make that website be available on other devices rather than a Computer i.e,Smart phones,iPads and
the kind. So My question is:
"Is there a way I can just make it be available as well in those devices or I must take a long journey to learn from scratch
on mobile web development so as I can make it be?"
The only thing I know is native webdesigning and development but still this challenge is good and I need to conquer it.
Any advice and help will be appriciated...

[peter_budo]

Any website is accessible by mobile devices these days. You just need to learn restrictions and serve appropriate content, therefore browser and operating system detection is important

[Bile]

Thanks peter,I made it to make it responsive up to this point and all is good waiting the next challenge.
Thank U.