Other Homework Help

I am having a problem with my macbook pro, the internet hasn’t worked in a week now. My other devices are connected and they work on the wifi,but not my mac’s internet also it says that that my network is connected to my mac. My macbook pro is the early 2011 model. I have also tried to connect to a public hot spot, and it doesn’t work. I think the problem has to do with the computer itself.