What is keycode for tab?

The keycode for the tab key is 9. This key is used to move the cursor or input focus to the next tab stop in a form or document. It is also commonly used in web browsers to switch between open tabs or to insert a tab character in text editors or word processors. The tab key is located on the left-hand side of most keyboards, above the caps lock and below the q key. In addition to the standard keyboard layout, many keyboards also include a tab key on the right-hand side for convenience.