Erased my startup disk
So I was trying to reset my computer and I think I erased the whole thing. Now it just comes up with this folder icon with a question mark in the middle what do I do
MacBook Air, Other OS
Question marked as
OS X: About OS X Recovery - Apple Support - https://support.apple.com/HT201314 and related: Disk Utility for Mac: Repair a disk using Disk Utility https://support.apple.com/kb/PH22243
How to reinstall macOS - https://support.apple.com/HT204904 - including different recovery keyboard options.
Be careful in your forum selection in future. You posted to a forum about operating systems on computers almost 20 years old.