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STATEMENTS FOR SEQUENTIAL FILES:
A basic operation on a file includes the reading and writing of its records.
Whenever the file is sequential, there are three verbs for the aim. These are READ, WRITE and REWRITE.
RULES OF RENAMES CLAUSE: The rules below should be observed while using the RENAMES clause: (i) All RENAMES entries should be written only after the last record descript
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)
Example of Sign condition: The illustration below describes the use of the sign condition. Illustration: 77 BALANCE PIC S9 (6) V99. . . I
RENAMES CLAUSE: At times re-grouping of an elementary data items in a record may be essential so that they can belong to the original as well as to the latest group. This is o
B (Blank Insertion) : The occurrence of a B anyplace in the picture will insert a space character in the edited data. There can be more than one B in the picture. Examples:
Write a COBOL IF sentence to use the values of numeric variables EXAM and COURSEWORK , both assumed to be with format PIC 999 and in the range 0 to 100 and to move the value:
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
Illustration of Multiply verb: (a) MULTIPLY A BY B. In this situation the value of A & B will be multiplied and the product will be stored in B. The decimal point locatio
77 level used for- It is Elementary level item. it Cannot be subdivisions of other items or cannot be qualified, or they can be subdivided themselves.
OCCURS - INDEXED BY PROGRAM: identification division. program- id. searching. environment division. data division. working-storage section. 01 table1. 0
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