comparision between usage is index and INDEXED By clause

muthukumarapandian · Posted: Fri Feb 25, 2005 7:54 pm

Hi,

Any one can tell me the comparision between usage is index and table with subscript as indexed item.

mdtendulkar · Active User Joined: 29 Jul 2003 Posts: 237 Location: USA

Hi muthukumarapandian,

Index gives you the offset from the start position where as Subscript gives you the occurence of the item.

Please find this book for more details...search for keyword "INDEX" or "SUBSCRIPT"

COBOL Programming Guide

Hope this helps

Regards
Mayuresh

muthukumarapandian · Posted: Sat Feb 26, 2005 9:43 am

Hi,
What is the difference between usage is index and the subscript in a table declared as index.

Eg.,

01 A usage index

01 s.
02 F pic 9(3) occurs 2 times indexed by I.

mmwife · Super Moderator Joined: 30 May 2003 Posts: 1592

Hi M,

An index data item (as opposed to the table index) us generally used to save a table position pointer for later reference.

For example, you may want to compare 2 values in the table after you've determined they meet certain criteria. You can save the index of the 1st entry in the index data item, so when you find the 2nd you can use the index to reference that and the index data item to reference the 1st.

narena · New User Joined: 16 Mar 2005 Posts: 18

Hi Muthu,

01 A usage index

01 s.
02 F pic 9(3) occurs 2 times indexed by I.

In the above example if we want to store the Value of I we use the Variable A. Becz we cannot store the value of I in an ordinary variable. Ok.