Tags

, , , , , , , , ,

LOW-VALUES and HGH-VALUES are Figurative constants in COBOL.

LOW-VALUES refers the lowest value in collating sequence.
(Hexadecimal Value – x’00’) – Minimum possible value for a character (EBCDIC)

HGH-VALUES refers the highest value in collating sequence
(Hexadecimal Value – X’FF’) – Maximum possible value for a character (EBCDIC)

Collating Sequence is the sequence of a system which decides the equivalent numeric value for each character typed in keyboard and the precedence b/w characters.

In PC, ASCII is the default collating sequence, while in Mainframe EBCDIC is the default.

So usually in Mainframe code, along with checking if a field has SPACES or ZEROS, field is also checked to see if it has these values (LOW-VALUES and HGH-VALUES) and then initialize accordingly.

Collating sequence of ASCII and EDCDIC can be found in below link
https://supportline.microfocus.com/documentation/books/nx40/lracha.htm

You can also set the required collating sequence inside your COBOL program.
Below post clearly explains it.
http://mainframe-tips-and-tricks.blogspot.com/2011/12/cobol-what-exactly-low-values-and-high.html

 

——————————————————————————————————–

If you would like to Earn Free Stocks, Credit card Points and Bank account Bonuses, Please visit My Finance Blog

——————————————————————————————————–

You may also like to look at:

Working on Mainframes – Is Change to a different technology necessary
Important SQL CODES and ABEND CODES
SORT JOIN – TO JOIN TWO FILES BASED ON A KEY
KNOW YOUR MAINFRAME
REXX – INITIAL SETUP
HOW TO SUBMIT A BATCH JOB FROM THE CICS PROGRAM
CICS – EXEC interface block – EIBRESP Values
CICS – EXEC interface block Fields
Flow of control between COBOL programs, run units, and CICS
CICS INTERVIEW QUESTIONS
CICS TIPS
COBOL – COPY and INCLUDE statements
COBOL – PERFORMANCE IMPROVEMENT
COBOL – SIGN STORED IN COMP, COMP-3 AND DISPLAY FORMATS
SHORTEST COBOL PROGRAM
RESTART LOGIC IN COBOL DB2 Program
GOBACK – EXIT PROGRAM – STOP RUN
Continuation lines in COBOL
Computational items – COMP, COMP 1 , COMP 2, COMP 3
COBOL program format
cobol indicator area column-7 and area a and area b
COBOL INTERVIEW QUESTIONS
COBOL TIPS
COBOL COMPILER OPTIONS
The IDENTIFICATION DIVISION