How do I scan a BAR CODE

Re: "How do I scan a bar code?"

Apple Support's article: Scan a QR code with your iPad camera - Apple Support

says:

"You can use Camera or the Code Scanner to scan Quick Response (QR) codes for links to websites, apps, coupons, tickets, and more. The camera automatically detects and highlights a QR code.

Use the camera to read a QR code

1. 1. Open Camera, then position iPad so that the code appears on the screen.
   2. Tap the notification that appears on the screen to go to the relevant website or app.

or

See the above article for how to "Open the Code Scanner from Control Center"