Here is piece of code written one of the infopackages.Please help me to understand this code.Points will be definitely assigned.
data: l_idx like sy-tabix.
read table l_t_range with key
fieldname = '/BIC/ZCRM_YFLG'.
l_idx = sy-tabix.
*....
if SY-SUBRC eq 0.
L_IDX = SY-TABIX.
*....
L_T_RANGE-SIGN = 'I'.
L_T_RANGE-OPTION = 'EQ'.
L_T_RANGE-LOW = '0'.
modify L_T_RANGE index l_idx.
Add second exclusion
endif.