The wi-fi doesn't work on my macbook pro but it woks on other devices. what can i do?

I have a macbook pro version 10.9.1 and it used to work perfectly until recently when the wifi just stopped woking. I have tried reloading the page checking the wifi router and turning the wifi on and off again and it still doesn't want to work. But what bothers me a lot is that on other devices the wifi works completely fine. Do you have any clue what to do?