• Create a new object

DATA(lo_obj) = new zcl_obj_factory(

EXPORTING
  input = |some nice string|

) DATA(lo_subobj) ?= lo_obj->do_nothing( ‘Char’ && ‘ String` ).

“ fetch material data SELECT SINGLE matnr, matkl, mtart, maktx

FROM mara 
INNER JOIN makt 
  ON makt~matnr EQ mara~matnr
INTO @data(ls_mara) 
WHERE matkl EQ '1324'
  AND spras EQ @sy-langu.

LOOP AT lt_mara ASSIGNING FIELD-SYMBOL(<mara>).

CHECK <mara>-mtart = '0001'.

ENDLOOP.

CALL FUNCTION ‘DO_NOTHING’

EXPORTING
  input = 'input'
IMPORTING
  output = 'output'
CHANGING
  to_change = lv_some_variable  
TABLES
  table_to_change = lt_some_table
EXCEPTIONS
  ERROR = 1
  OTHERS = 2.