Technical Articles

Michael Keller

February 15, 2021 Less than a 1 minute read

What does DO/ENDDO do?

Dear community, for the little fun in between here’s some ABAP to check:

DATA lv_count TYPE i VALUE 1.

DO lv_count TIMES.
    lv_count = lv_count + 1.
    WRITE / 'What am I doing?'.
ENDDO.

Simple question is: How often the loop is executed?

Possible answers:

Once only.
Over and over and over (never stops).

If you want to try it out quickly, you should use the transpiler by Lars Hvam. The right answer to the question above is available at help.sap.com.

Best regards, thanks for reading and stay healty

Michael

P. S.: Not tired of reading blogs? Check this one about ADT element info. Really great!

7 Comments

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Lars Hvam

February 16, 2021 at 4:49 am

    DATA tab TYPE string_table.
    APPEND |foo| TO tab.
    APPEND |bar| TO tab.
    APPEND |moo| TO tab.
    LOOP AT tab TRANSPORTING NO FIELDS WHERE table_line = bar( ).
    ENDLOOP.

this is also interesting, how many times is the bar() method executed?

Shai Sinai

February 16, 2021 at 8:08 am

DATA tab TYPE string_table.
APPEND |foo| TO tab.
APPEND |bar| TO tab.
APPEND |moo| TO tab.
DATA tabix TYPE sy-tabix.
LOOP AT tab TRANSPORTING NO FIELDS WHERE table_line = bar( tabix ).
tabix = sy-tabix.
ENDLOOP.

Would make it even more interesting.

Lars Hvam

February 16, 2021 at 8:18 am

yeap 😉

Jagdish Patil

February 17, 2021 at 6:57 am

Looks interesting, I wish I could get this, but what is bar( ) method?

Jörgen Lindqvist

February 17, 2021 at 7:40 am

It could be any method, that doesn't really matter, the interesting part is how many times it will be executed... 🙂

GED HURST

February 16, 2021 at 9:34 am

Hmm. I didn't expect that result!

Simon Ling

January 4, 2023 at 3:01 pm

https://help.sap.com/doc/abapdocu_750_index_htm/7.50/en-US/abapdo.htm

The number value of n when entering the loop determines the maximum amount of passes of the statement block.

So loop once only.

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What does DO/ENDDO do?

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