Simple loop - while & do

[Former Member]

Hi,

I wrote the code as below, when i was debugging everthing is working fine but when i was executing directly, the cursor is not coming out. can you please suggest me the alternative.

code is

data: gv_delay type i value 10,

gv_time_end type sy-uzeit.

gv_time_end = sy-uzeit + gv_delay.

• while sy-uzeit le gv_time_end.

• write: /10 sy-uzeit.

• endwhile.

do.

if sy-uzeit > gv_time_end.

exit.

endif.

write: /20 sy-uzeit.

enddo.

write: /10 'Something'.

regards,

Jaya

[Former Member]

Try:

do.
  get time
  if sy-uzeit > gv_time_end.
    exit.
  endif.
  write: /20 sy-uzeit.
enddo.

Rob

[Former Member]

Hi Rob,

Its really wonderful, i will surely reward points. But can you please let me know what exactly the problem in my code & what is happening when we use <b>get time.</b>

Thanks

jaya

[Former Member]

Get Time is basically updating the following fields:

sy-datlo, sy-datum, sy-timlo, sy-uzeit, and sy-zonlo to the current value.

Without the command Get Time you are using the same value for sy-uzeit for every iteration through the loop.

Message was edited by:

Davis

[Former Member]

You would think that sy-uzeit would always contain the current time, but it doesn't. According to the documentation, GET TIME:

Sets the system field SY-UZEIT to the current time and resets SY-DATUM. Also refreshes the SY fields for the local time zone, i.e. SY-TIMLO, SY-DATLO and SY-ZONLO. 

Rob

[Former Member]

Rob, when I first opened this thread I assumed that it did contain the current time. I was quite surprised to find out (through debug) that it didn't. This could be valuable information in the future.

Regards,

Davis

[Former Member]

The question is why it worked in debug mode at all.

Things like COMMITs will also reset sy-uzeit and I guess also executing a command in the debugger.

Rob

[Former Member]

You need to get the time inside your loop. Otherwise you are working with the same time and will create an infinite loop.

Regards,

Davis

EDIT: Sorry, I did not see that Rob already responded with the correct code.

Message was edited by:

Davis

[Former Member]

Hi Rob & David,

Both are really unsful to me so i rewarded both of you...

regards

jaya