How to check if your phone has a virus in settings?

Excuse me, I was wondering if you could help me with something. I've been a bit concerned about the possibility of my phone having a virus, and I've heard that checking the settings is one way to do it. Could you explain to me in detail, step-by-step, how I can go about checking if my phone has a virus in the settings? I'm not very tech-savvy, so I'd appreciate it if you could keep the explanation simple and easy to understand. Thank you very much in advance for your help.