Increment a number within a string

Hi!
How can I increment a number within a string ?
This code doesn' t provide the rigth result
DATA zahl TYPE I.
DO 10 TIMES.
zahl = zahl + 1.
write:/ 'HALLO zahl'.
ENDDO.

Hello,
Change the code like this.
DATA ZAHL TYPE I.
DATA: LV_ZAHL(8),
CHAR(255).
DO 10 TIMES.
ZAHL = ZAHL + 1.
WRITE: ZAHL TO LV_ZAHL.
CONCATENATE 'HALLO' LV_ZAHL INTO CHAR.
CONDENSE CHAR NO-GAPS.
WRITE:/ CHAR."'HALLO'NO-GAP,ZAHL NO-GAP.
ENDDO.
Regards,
Vasanth

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