SAP program to insert multiple records through selection screen

 REPORT zsm_data_two.

TYPES: BEGIN OF ty_data,
         field1 TYPE char20,    "creation of structure
         field2 TYPE char20,
         field3 TYPE char20,
         field4 TYPE char20,
       END OF ty_data.

DATA: lt_data TYPE TABLE OF ty_data,    "creation of internal table

      ls_data TYPE ty_data.             "creation of work area

PARAMETERS: p_field1 TYPE ty_data,      "Assigning fields in selection screen
            p_field2 TYPE ty_data,
            p_field3 TYPE ty_data,
            p_field4 TYPE ty_data.

AT SELECTION-SCREEN OUTPUT.

START-OF-SELECTION.

  ls_data-field1 = p_field1.            "Assigning values in fields
  ls_data-field2 = p_field2.
  ls_data-field3 = p_field3.
  ls_data-field4 = p_field4.

  APPEND ls_data TO lt_data. "Entering values through work area into internal table
 
  LOOP AT lt_data INTO ls_data.
    WRITE: / 'Field1:', ls_data-field1,
           / 'Field2:', ls_data-field2,
           / 'Field3:', ls_data-field3,
           / 'Field4:', ls_data-field4.   "Displaying The Output Of The Program
  ENDLOOP.

    O U T P U T   :-