List Google Drive File IDs on script.google.com

Code.gs

//partially from https://spreadsheet.dev/export-list-of-files-in-google-drive-to-google-sheets-using-apps-script

function myFunction() {
  var myFiles = DriveApp.getFiles();
  while(myFiles.hasNext()) {
    var file = myFiles.next();
    if(file != null) {
      console.log(file.getId());
    }
  }
}