Class condition - cobol programming, COBOL Programming

CLASS CONDITION:

 The class condition establishes whether or not the value of the operand is numeric or alphabetic. The operand is numeric if it contains only the digits 0 to 9 with or without the operational sign. An operand is alphabetic if it holds only the letters A to Z & space. The format of the class condition is as shown below:

The rules shown below apply in the situation of the class condition.

(i) The usage of the identifier should be DISPLAY or some forms of the DISPLAY.

(ii) For the NUMERIC option the identifier should be either numeric or alphanumeric.When the data item is defined with the operational sign then the appearance of the sign is considered as normal.

(iii) For the alphabetic option, the identifier should be either alphabetic or alphanumeric.

(iv) The identifier might be a group item. Though, for the NUMERIC option, the group item should not consists elementary items explained with an operational sign.

The class condition is very helpful for the validation of the input data. In COBOL, the data is read in the record region in similar form as recorded on the external medium regardless of the specified class of the individual fields in the record. For illustration, if we are reading the value of the numeric field from a card and the corresponding position in the card contains non-numeric characters, then the system will not detect it to be an error. Rather than, the nonnumeric characters will be stored in the character positions of the numeric field. This error may even pass ignored as during any subsequent numeric operation (like numeric MOVE or arithmetic operation), only the numeric portion of the characters in the field be used. And hence, the possible punching mistake in the data card can go and detected unless the proper care is taken. One may avoid a few of these blunders through the use of the class condition. 

Posted Date: 10/17/2012 1:40:48 AM | Location : United States







Related Discussions:- Class condition - cobol programming, Assignment Help, Ask Question on Class condition - cobol programming, Get Answer, Expert's Help, Class condition - cobol programming Discussions

Write discussion on Class condition - cobol programming
Your posts are moderated
Related Questions
PROGRAM TO FIND INTEREST ON BANK DEPOSITS: We have to write a program to find interest on deposits. The criteria is given below : identification division. program-

What is the difference between subscript and index

FILE STATUS clause: This clause has been involved in the above syntax for completeness. The ORGANIZATION, REVERSE, ACCESS and STATUS clause can be specified in any order.

Example of Accept statement: For illustration, ACCEPT FLAG-A can be specified to read the value of the FLAG_A from the console. It may be keep in mind that no file definition

Valid and Invalid Word - Cobol words: Valid Word             Invalid Word & Reason emp-sal                  -pay   ( it starts with a hyphen)  TOTAL MARK (blank space em

SUBTRACT VERB: The SUBTRACT verb is used to subtract one, or the sum of two or more numbers from one or more numbers and to store the result. The form of the SUBTRACT verb

RESERVE clause: This clause indicates the number of buffers to be used for the file. Integer-1 specifies this number. ORGANIZATION/ACCESS clause: These two clause

FILE-CONTROL paragraph for the relative files: The normal format for the SELECT clause for a relative file is as shown below. SELECT  file-name  ASSIGN  TO  implementor-nam

Configuration Section: This section holds an overall specification of the computer used for the purpose of the compilation and execution of the program. There are in all 3 par

Examples - Edit characters for numeric data: The following illustration illustrates the use of Z editing characters. The character b is used to indicate the space character an