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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 the OPEN verb it should be also indicated whether the file must be opened as an input file or output file. If it is an input file, only the reading is possible, while in the case of an output file, only writing is possible. The file once opened remains open until it is closed by the CLOSE statement. The OPEN statement in its easiest form is as shown below:
Edit Characters for Numeric Data: The characters below can be used in the PICTURE clause to indicate the editing. Z * $ - + CR DB . , B O /
Display control verbs in Cobol
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
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 ENTRIES FOR THE SEQUENTIAL FILES: The characteristics of each and every files handled in a program are specified in the ENVIRONMENT DIVISION and DATA DIVISION.
The LENDER Bank offers mortgages on homes valued up to $500,000. The required down payment is calculated as follows: 4% of the first $60,000 borrowed 8% of the next $30,000 borro
PROGRAM TO DEMONSTRATE MERGE VERB: The two files for which a record having 2 fields viz. Account Number and Name are already available. Now Merge these two files and create a
PROGRAM FOR MULTIPLY VERB: We have to write a simple program to elaborate MULTIPLY verb. You can also use the edit characters in the program. Identification division. Pr
OCCURS CLAUSE - PROGRAM: We have to write a program to elaborate occurs clause. Get names and marks of the students and show them on the screen. identification division.
REWRITE STATEMENT: The REWRITE statement has the format for a relative file as shown below, REWRITE record-name [ FORM identifier ]
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