Answer Posted / ashutosh rai

A field string is a type of variable, and is the equivalent
of a structure in the DDIC but is defined within an ABAP/4
program. Like a structure, a field string is a series of
fields grouped together under a common name. The difference
lies mainly in where the definition resides. The term
structure in R/3 applies only to a Data Dictionary object
containing a collection of fields. The term field string
applies to a collection of fields defined in an ABAP/4 program.

Two statements are usually used to define field strings in
an ABAP/4 program:

* data
* tables

The following is the syntax for defining a field string
using the data statement.

data: begin of fs1,
f1[(l)] [type t] [decimals d] [value 'xxx'],
f2[(l)] [type t] [decimals d] [value 'xxx'],
...
end of fs1.

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