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Common form of the READ statements:
Format 1 is the common form of the READ statements.
Format 2 is used when the access mode is either random or dynamic. For illustration, assume REL-KEY is the names for the relative file and the relative key data item respectively. The statements below will read the 50th record from the file.
MOVE 50 TO REL-KEY.
READ REL-FILE RECORD INVALID-KEY GO TO PARA-INVALID.
Format 3 of the read statement can be used whenever the access mode is dynamic and the records are to be read successively.
Data types available in COBOL are given below Alpha-numeric (X), numeric (9), alphabetic (A)
Valid and Invalid Word - Cobol words: Valid Word Invalid Word & Reason emp-sal -pay ( it starts with a hyphen) TOTAL MARK (blank space em
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How do I move a single QUOTE to a field or set the value clause? "''" does not work?
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Illustration of perform statement: PERFORM CALCUALTE-TAX. In this illustration, the CALCULATE-TAX is either a section name or paragraph name. Assume that it is a section
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