ABAP syntax questions...

[aris_hidalgo]

Hi guys, I just want to know the use of the following ABAP syntax. I tried using the F1 help but I still couldn't understand it fully. Please give examples and explanations on what they do in programs. Below are the syntax:

field-symbols

initialization

start-of-selection

top-of-page

at line-selection

at new

at end

delete adjacent...comparing

loop at itab assigning

set parameter id

endat

If you could give me examples and explanations I would really appreciate it.Thanks!

[Former Member · Accepted solution]

Hi Viraylab,

If u want to get examples for these simply goto se38 and there in one of the menu items you will be able to see <b>abap examples</b> click on that and various sample programs will be listed there.

Thanks & Regards,

Vanita.

[Former Member]

**field symbols are used similar to pointers in C..

• Loop at itab assigning <fs_itab> --> fs_itab is the field symbol which stores the addressof itab..so u can directly modify itab without using statement 'MODIFY'.

**Start-of-selection--> this statement indicates the start of database access in the code.

**top-of-page--> to write anything(HEADING) at the beginning. this event gets trigerred at the first write statement.

**at line-selection> it is used in interactive lists. in ur output, when u click on a line, this event triggers> subsequently the secondary list appears.

**at new--> while in a loop, consider a field...if u want something specific for every new value of this field in the table,use it.

eg at new matnr. write 'New Material'.

**at end of--> similarly used as at new.

**delete adjacent...comparing--> suppose there r records in itab and u want only one record for each matnr.. so if there r multiple records for a matnr..use this...( comparing matnr).

**set parameter id--> to put values in a screen field

**endat--> concluding statement for 'at'.

Hope it helps.

Regards,

Bikash