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INPUT-OUTPUT SECTION:
This section holds information regarding the files to be used in the program. There are 2 paragraphs in this section- FILE-CONTROL & I-O-CONTROL.
The FILE-CONTROL is used almost in every program. Below are some of the entries of the FILE-CONTROL paragraph. The Input-Output section is elective in many computers.
LEVEL NUMBERS: The COBOL makes use of the level number concept to explain the hierarchical data structure. A level number is a 2 digit number. The permitted level numbers a
Edit Characters for Numeric Data: The characters below can be used in the PICTURE clause to indicate the editing. Z * $ - + CR DB . , B O /
Comparison of the Numeric Operand with Nonnumeric Operand: The numeric operand can be compared to the nonnumeric operand subject to the restrictions which are as follows.
Example of Class condition: Let the BASIC-PAY be a data name in the card record defined with picture 9(5) V99. By reading the card we can test the value of the BASIC-PAY to ma
SEQUENTIAL FILES: The purpose of the proposed section is to introduce the concepts such as File characteristics, File Description for Fixed-Length Records, File-Control
OPEN statement: We know that the processing of a file should start with the execution of an OPEN statement. The file can be opened in any one of the 4 open modes - INPUT, OUTP
, (Comma) : A comma, whenever used in a picture, is considered as an insertion character and inserted wherever it become visible. There can be more than one comma in the pictu
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
FILE-CONTROL: The FILE-CONTROL paragraph names each and every file and identifies the first medium through file control entries. The basic format of a file control entry is gi
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