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Identification Division:
The Identification Division is the first division of each and every COBOL source program. The paragraph PROGRAM-ID is necessary in most of the machines. The other paragraphs are elective.
The structure of Identification division is shown below:
IDENTIFICATION DIVISION.
PROGRAM-ID. Entry
[AUTHOR. entry.]
[INSTALLATION. entry.]
[DATE-WRITTEN. entry.] Optional
[DATA-COMPILED. entry.]
[SECURITY. entry.]
[REMARKS. entry.]
The division heading and paragraph names must be coded as A margin entries. The entries subsequent the paragraph headings should be terminated by a period. The entry in the PROGRAM-ID paragraph includes the program name to be used to identify the object program.
The entries in the other paragraphs are generally treated as comments and the programmer is free to write whatever thing for these entries. Only significant entries must be included in these places to provide better clarity and documentation.
The entry for the AUTHOR paragraph may include the name of the programmer. The entrance of the DATE-COMPILED paragraph may hold the date of compilation. If this entry is left blank, then the compiler inserts the real date in the listing of the source program which may be printed during the compilation.
FILE-CONTROL paragraph for the indexed files: The common format for the SELECT clause for a file is as shown below: SELECT file-name ASSIGN TO implementor -name
Direct Organization: Besides the relative or indexed organization, also a direct access file can be designed to have what is termed as direct organization. In this organizati
FILE-CONTROL: The FILE-CONTROL paragraph names each and every file and identifies the first medium through file control entries. The basic format of a file control entry is gi
single program how may when statement has used
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MULTI-DIMENSIONAL TABLES: The type of table which has been considered above is known as one-dimensional table. Whenever a table is such that each of its elements in turn is a
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
SIGN CONDITION: The sign condition establishes whether or not the algebraic value of an operand is negative, positive or zero. The operand can be either the numeric identif
OPEN STATEMENT: Whenever a READ or a WRITE operation is executed on a file, then it should be open. The opening of a file may be completed with the help of the OPEN verb. With
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