How to know the data type of a variable?

Hi,
Can anyone tell me which function can return the name data type of a variable?
Thanks!
Message was edited by: Long Zheng

Hi long,
1. I don't know whether this will serve your purpose.
2.
REPORT abc.
DATA : components     LIKE     rstrucinfo OCCURS 0 WITH HEADER LINE.
DATA : t001 LIKE TABLE OF t001 WITH HEADER LINE.
CALL FUNCTION 'GET_COMPONENT_LIST'
EXPORTING
    program    = sy-repid
    fieldname = 'T001'
TABLES
    components = components.
LOOP AT components.
WRITE :/ components-compname , components-type.
ENDLOOP.
regards,
amit m.

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How to know the data type of a variable?

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