What are the various events in classical reports? | SAP-ABAP

  Various events in classical reports are:
=>    INTIALIZATION— This event is activated before the selection screen is displayed.
=>    AT-SELECTION-SCREEN— This event occurs after processing user input.
=>    START OFSELECTION— It occurs after processing the selection screen.
=>  END-OF-SELECTION— It is used for logical database reporting or can be used after all the processing.