AS i am Mainframe fresher i have some problems with COMP variables..
Can anybody explain me when i Can use COMP, COMP-2 And COMP-3 data type while declaration of data??
Thanks in advance
WHEN TO USE COMP FIELD
Moderators: dbzTHEdinosauer, Moderator Group
-
- Member
- Posts: 10
- Joined: Tue Dec 11, 2007 1:33 am
comp,comp-2,comp-3
Hai,
when u declare a data item as comp then the internal representation is in the form of pure binary . There should be no decimal points . This is generally used for the subscripts.
when u declare a data item as comp-1 or comp-2 then the internal
representation will be in floating point form . comp-1 and comp-2 are
same except that comp-2 has the more precision than comp-1 .
when we are declaring a variable as comp-1 or comp-2 no pic clause should be given.
when u declare a data-item as comp-3 then the internal representation
will be in the form of packed decimals . And each digit occupies half a byte and for sign a half byte will be taken .
for eg: 01 data-item pic s9(5)v9(3) comp-3.
this occupies a total of 4 bytes and another half byte for sign . so a total of 5 bytes.
when u declare a data item as comp then the internal representation is in the form of pure binary . There should be no decimal points . This is generally used for the subscripts.
when u declare a data item as comp-1 or comp-2 then the internal
representation will be in floating point form . comp-1 and comp-2 are
same except that comp-2 has the more precision than comp-1 .
when we are declaring a variable as comp-1 or comp-2 no pic clause should be given.
when u declare a data-item as comp-3 then the internal representation
will be in the form of packed decimals . And each digit occupies half a byte and for sign a half byte will be taken .
for eg: 01 data-item pic s9(5)v9(3) comp-3.
this occupies a total of 4 bytes and another half byte for sign . so a total of 5 bytes.
FREE TUTORIALS
Tutorials
Free tutorials from mainframegurukul
- JCL Tutorial
Covers all important JCL concepts. - Cobol Tutorial
This tutorials covers all Cobol Topics from STRING to COMP-3. - DB2 Tutorial
DB2 Tutorial focuses on DB2 COBOL Programming. - SORT Tutorial
This Tutorial covers all important aspects of DFSORT with examples - CICS Tutorial
This CICS tutorial covers CICS concepts and CICS Basics, CICS COBOL Programming.
Interview
Mainframe Interview questions
- Cobol Interview Questions
50+ Interview Questions - JCL Interview Questions
50+ Interview Questions - DB2 Interview Questions
100+ Interview Questions - CICS Interview Questions
70+ Interview Questions - VSAM Interview Questions
27 Interview Questions
Other References
Mainframe Tools and others
- XPEDITER Reference
Explains how we can debug a program - FILEAID Reference
Explains how to browse , edit and delete datasets - Change Man Reference
Quick Start tutorial on Changeman - Abend Reference
Important Abend codes explained - FaceBook Page
MainframeGurukul FaceBook Page - LinkedIn Page
MainframeGurkul Linkedin Page