Reduce command is one of the nice innovations that came to ABAP with 7.40 SP08, it is an operator that simplifies most of the operations you do in the loop, such as getting the number of unique values in a table, printing side by side, totaling, etc.
In the example below, we have names in our it_strings table, we are asked to print them side by side in the desired scenario, for example you can use this to print the rows returned from READ_TEXT side by side,
DATA(it_strings) = VALUE stringtab( ( |Ahmet| ) ( |Mehmet| ) ( |Mustafa| ) ).
DATA(lv_concat_strings) = REDUCE string( INIT s = ||
FOR <s> IN it_strings
NEXT s = COND #( WHEN s IS INITIAL THEN |{ <s> }| ELSE |{ s }, { <s> }| ) ).
The result of the above operation will be as follows.
