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Example of Open statement:
Illustration:
The OPEN INPUT TRANSACTION, OLD-MASTER OUTPUT NEW-MASTER.
The illustration represents that there are two input files named the TRANSACTION and OLD-MASTER and one output file known as the NEW-MASTER. All these files are opened and these are prepared for reading or writing.
OPEN INPUT MARK-FILE.
OPEN OUTPUT RESULT-FILE.
The first OPEN statement opens the MARK-FILE in the input mode and the file is ready for the reading. The later statement makes the RESULT-FILE ready for the writing. There may be numerous OPEN statements in a program.
IF STATEMENT: The easiest form of the IF statement is IF condition-1 statement-1 where the condition-1 may be any one from the shown below. When the condition-1
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 mac
.(Period or Decimal Point) : The period may be used to insert a decimal point and may not come into view more than once. Both the period and V cannot appear in similar picture
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 INDEXED SEQUENTIAL FILE CREATION (RANDOM MODE): We have to write a program to create an Indexed Sequential File in random mode for Student particulars. Suppose jus
PROGRAM FOR IF -ELSE: We have to write a program to check whether the given number is ODD or EVEN. You can use IF..ELSE. Identification division. Program- id. IfElse.
Concept of a two-dimensional table: Concept of a two-dimensional table can be easily extended to tables having three or more dimensions. The Handling of tables up to three dim
DECLARATIVE and FILE STATUS Clause: The input-output exception condition in the situation of a direct access files can be handled by a declarative procedure in a manner simila
File volatility: File volatility associates to the number of times the updating of records are needed during some time period. File interrogation: Some files hold re
PICTURE specification: The size of a group item is equivalent to the total of the sizes of all the subordinate elementary items. The group item class is alphanumeric. The i
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