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Selection of file Organization:
While designing a file, the programmer should select an appropriate association for a file. The order in which the choice is to be made is as shown below:
(i) Implementation support difficulty.
(ii) Software support required.
(iii) Efficiency of processing.
READ STATEMENT: The aim of this verb is to make available the next logical record from the input file. It is important to note the meaning of the "next" logical record in the
Format for COBOL Programs: The COBOL is a high-level language. Therefore, a COBOL program can be executed on a computer for which a COBOL compiler exists. The compiler transla
Abbreviation: The Consecutive relational conditions in a compound condition can be abbreviated in many cases as shown: (i) When the subjects in the consecutive relational c
COBOL Words: The COBOL word can be formed by using the characters as shown below: 0-9 A-Z (a-z) - (hyphen) The rules below should be hold in forming the COBOL words.
Example of Perform statement: PERFORM BEGIN-CALCULATION THRU END-CALCULATION. Assume, BEGIN-CALCULATION and END-CALCULTION is paragraph names. The execution of the PERFORM
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)
Encryption and Decryption
CR and DB (Credit and Debit Sign): The two characters that is CR or DB symbol may appear only at the rightmost place of the picture. They are similar to the minus sign edit ch
DISPLAY STATEMENT: The function of the DISPLAY statement is just opposite to that of the ACCEPT statement. It is used to display the low-volume results on the operator's co
REWRITE STATEMENT: The REWRITE statement has the format for a relative file as shown below, REWRITE record-name [ FORM identifier ]
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