RE: Testing for valid numeric in an alpha field

Dan.

Yes, you can make terrible(unreadable) nested if-statements without any 
'END-IF's, only with a single period at the end.  With a lot of testing, 
you can make it work.  And this has been done a lot before the 'END-IF' 
came along(sigh...).  The 'END-IF' delimit the scope of each single IF, 
and therefore gives you a possibility to let other persons(and yourself 
after a while...) understand what's going on in complex IF-combinations. 
Another thing is that IF-combinations should not have complex coding. Make 
it simple and readable!


Mvh.

Geir Kildal

 




Dan <dbcerpg@xxxxxxxxx>
Sent by: cobol400-l-bounces@xxxxxxxxxxxx
17.06.2003 21:19
Please respond to COBOL Programming on the iSeries/AS400

 
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        Subject:        RE: Testing for valid numeric in an alpha field


--- geir.kildal@xxxxxxxxxxxxxx wrote:
> Just an example on IF's in COBOL:
>
>
> IF A                    = X
>      IF B                       = Y
>           IF C          = Z
>         DO SOMETHING
>          END-IF
>      END-IF
> END-IF.
>
> The END-IF's just make the code easier to read....

But it appears that this is possible:

IF  A = X
  IF  B = Y
    IF  C = Z
      DO THIS
    END-IF
    IF  D = Q
      DO THAT
    END-IF
  ELSE   (this is B NOT = Y)
    IF  K = M
      do the dew
    END-IF
  END-IF
END-IF.

Can you do this kind of nesting without using the END-IF?  If so, how?

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