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Data Names and Identifiers:
The Data name provides reference to the storage space in the memory where the real value is stored. This value takes part in the operation whenever that specific data name is used in the Procedure Division.
The Identifier is a general term that means the single data name or a data name qualified, indexed or subscripted. The Data names are only one form of the identifiers. The data name should be a user-defined word and it cannot be a reserved word.
Examples:
Valid Data Names Invalid Data Names
NET-SALARY COMPUTE (Reserved word)
TOT-MARK MULTIPLY (Reserved word)
N100 23 (No letter)
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Example of constructing an arithmetic expression: An arithmetic expression may be proceeded by a + or - sign. These operations are known as unary + or unary - operators. Il
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Figurative Constants: The Figurative constants have several fixed names and the compiler recognizes these names and it sets up the equivalent values in the object program.
Rules for Simple sort verb: The work file is to be defined by a sort elaboration entry (SD entry).The format of SD entry is as shown below. The rules below should be taken
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