On Windows, open Command Prompt and type `ipconfig`
Look for `IPv4 Address` under your active network adapter
On Windows, open Settings > Network & Internet > Wi-Fi or Ethernet > your connection > Hardware properties
On macOS, open System Settings > Network > select your connection
On macOS, open Terminal and type `ifconfig` or `ipconfig getifaddr en0`
On Linux, open Terminal and type `ip a` or `hostname -I`
To find your public IP address, search `what is my IP` in a web browser
To find your router-assigned local IP, check your network adapter details
To find your IP in a browser, visit a site like `whatismyip.com` or `ipinfo.io`