Can i get a router or a wireless router without a ISP ( internet service provide

Buying a setting up a router will not allow you to connect to the internet only using the router, you need an active internet connection through a modem for example and then you connect the router to the modem so you can share the internet connection within your household. For example, this pc i am writing this on is connected to a wireless home network. I am connected to my Dlink wireless router which is in turn connected to the cable modem and thats how i get the internet onto my pc.