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Label Records / Disk Directory:
The most important information stored in the header label is what is termed as the file title. In the situation of magnetic-disk files the labels normally do not exist (there are lots of exceptions). As, more than one file is stored on a disk pack, the Input-Output control system also maintains a disk directory for all the files.
Structure of a COBOL Program: Every COBOL program should have the 4 divisions in the order in which they are specified below: 1. Identification division 2. Environment D
Column and Field in COBOL program: In COBOL there are 2 types of entries termed as margin A and margin B entries. The Margin A entries start from the column 8, 9, 10 or 11 and
FD Entry for variable-length Records: The RECORDS CONTAINS and BLOCK CONTAINS clause are quite dissimilar in the case of files with variable- length records. The syntax of the
WRITE STATEMENT: The records are written to be logical place as determined from the value of the record key. The INVALID KEY condition occurs in the cases shown below: (i)
PROGRAM FOR SIZE ERROR: We have to write an easy program to elaborate the size error option. Identification division. Program- id. sizeerr. Environment division.
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.
READ STATEMENTS: The common format for the read statements is as shown bellow. Format 1: READ file-name RECORD [ INTO identifier ] [ ; AT END imperative-s
PROGRAM FOR SUBTRACT VERB: We have to write a simple program to elaborate the SUBTRACT verb. You can also use edit characters in the program. Identification division. Pr
ROUNDED OPTION: Let us consider the DATA DIVISION entries which are as shown below: Now, subsequent to the execution of the statement ADD A B GIVING C, the C will hold
Object-Computer - Configuration section: The computer name specifies a specific computer on which the object program is to be executed. The MEMORY SIZE is used to show the
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