@roopankumar said in WiFi router connectivity:
will the laptop can use the router for internet...
You mentioned a wifi modem. Technically a modem and router are different things. We are guessing you mean that you have a consumer router / firewall / switch / access point / modem all in one. But that's a bit of a guess. There's no info in your question. So based on nothing other than "what people tend to buy and call these things", yeah, likely your setup will work.
But do we have anything to go on to determine this? No, not a single detail that we'd need to know to actually determine it.