sap abap basic programming notes


There is mainly two types of statement which are using in ABAP:

1> Conditional statement
2> Lopping Statement.

Now in details:

Conditional statements:


1.  if-else

            Syntax:

                        if  <condition 1>.
                                    statements.
                        else-if  <condition 2>.
                                    statements.
                        ----
                        elseif  <condition  n>.
                                    statements.
                        else.
                                    statements.
                        endif.

            2.  Case-endcase (similar to switch statement in 'C' lang)
            Syntax:
                        case  <variable>.
                                    when  <value 1>.
                                                statements.
                                    when <value 2>.
                                                statements.
                                    ----
                                    when others.
                                                statements.
                        endcase.

            3.  Check:
            Syntax:
                        check  <condition>.
                                    statements.
Looping statements:

            1.  While-endwhile
            Syntax:
                        while  <condition>.
                                    statements.
                        endwhile.

            2.  Do-enddo
            Syntax 1:
                        do.
                                    statements.
                                    <Exit condition>.
                        enddo.
            Syntax 2:
                        do  <n>  times.
                                    statements.
                        enddo.

            3.  Loop-endloop   -à internal tables
            syntax:
                        loop  at  <int.table>  [condition].
                                    statements.
                        endloop.

            4. Select-endselect  à database programming
            Syntax:
                        select  <query>.
                                    statements.
                        endselect.
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