LOOPS
SY-INDEX Within a loop it  contains the number of loop passes including the current pass and is set by ABAP commands DO,WHILE.
STRINGS
SY-FDPOS It contains the location of a hit in string operations. used with CO,CN, CA, NA, CS, NS, CP, and NP, offset values are assigned to SY-FDPOS depending on the search result.


Serkan AKKAVAK
Computer Engineer
serkurumsal@yandex.com