The keyword “AT” is used with screen events and internal table loops. Here is the various syntax usage of ABAP AT keyword.
With Screen Events
- AT SELECTION-SCREEN…
- AT LINE-SELECTION.
- AT USER-COMMAND.
- AT PFn.
Inside Loops
- AT NEW <f>.
- AT END OF <f>.
- AT FIRST.
- AT LAST.
- AT <fg>.
The statements are enclosed within AT and ENDAT keywords.
Also Read : View Other ABAP Keywords & Syntax -> ABAP Transaction codes