Answer / dilip

1. Both will act as same.
Workarea we will create it explicitly but where as headerline with delacation of internal table we will get it.

example:
DATA: wa_mara type mara.
DATA: T_MARA TYPE TABLE OF MARA WITH HEADER LINE.

Answer / sai

both are same functionality. workarea will be explicitly
created , where as in headerline it will be created
defaultly.

Answer / manoranjan

WA is nothing but a structure has some filelds.
like DATA : wa type vbak.
But wa with header line specifies,it will act as structure as well as an internal table.
like DATA : wa type table of vbak with header line.
here WA is a structure and internal table.

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