Is there a cancer gene and if so, what are my chances on getting cancer?

On my dad's side of the family, my Great grandfather had cancer and died, my grandfather and grandmother has cancer and my dad had cancer and died from it. Im not completely sure if ky great grandmother had cancer, i know she died at a young age, my grandmother had trouble talking about. I'm not sure of my mom's side, alot of my mom's side has addiction issues.