Getting started with cobol GnuCOBOL installation with GNU/Linux ACCEPT statement ADD statement ALLOCATE statement ALTER statement CANCEL statement CALL statement COMMIT statement COMPUTE statement CONTINUE statement COPY directive String DELETE statement DIVIDE statement DISPLAY statement EVALUATE statement EXIT statement GENERATE statement FREE statement GO TO statement GOBACK statement IF statement INITIALIZE statement INITIATE statement INSPECT statement MERGE statement MOVE statement MULTIPLY statement OPEN statement PERFORM statement READ statement RELEASE statement RETURN statement REPLACE directive REWRITE statement SET statement SEARCH statement SORT statement START statement SUBTRACT statement STOP statement TERMINATE statement STRING statement SUPPRESS statement UNLOCK statement Intrinsic Functions UNSTRING statement USE statement WRITE statement Data division How does the computational work in cobol?

DISPLAY statement

Remarks:

The DISPLAY statement causes data to be transferred to hardware or software of the operating environment. DISPLAY comes in two forms, UPON device or for display of SCREEN data. Environment variables can also be set with DISPLAY UPON in some implementations of COBOL, along with other extensions for data transfer of graphics or other device specific needs.

DISPLAY UPON

DISPLAY "An error occurred with " tracked-resource UPON SYSERR

DISPLAY A, B, C UPON CONSOLE

DISPLAY group-data UPON user-device
    ON EXCEPTION
        WRITE device-exception-notice
    NOT ON EXCEPTION
        WRITE device-usage-log
END-DISPLAY

UPON CONSOLE is a default, rarely written. Messages with DISPLAY are one way of debugging COBOL code, but many COBOL programs are transactional in nature, and might not ever interact with a human operator once a job is submitted.

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Topic Id: 7082

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