This course introduces and explains the PL/I programming language, and teaches experienced programmers how to code, maintain and debug PL/I programs. As well as covering the syntax of all the main PL/I statements, the course gives attendees a great start to using PL/I confidently, correctly and efficiently. Several exercises are used to consolidate all the major topics covered. The final exercise builds up to a complete and well structured program. The course is designed for the IBM Enterprise PL/I compiler.<br><br>This course is available 'on demand' (minimum 2 students) for public presentations and for one-company, on-site presentations.
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All attendees should be experienced applications programmers with an understanding of the mainframe computing environment. This can be gained by attending the course IBM z Systems - Explained. The ability to edit programs and submit jobs is also assumed.
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Delegates will learn how to

  • code typical commercial PL/I programs using efficient and structured code
  • write efficient and structured code
  • compile, test and debug PL/I programs
  • access and use the online PL/I manuals effectively.
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PL/I concepts

Format,; PL/1 character set; Keywords,; coding standards.


Files; Character; Bit; Decimal; Binary. Picture; Initialization.


Sequential input and output; fixed length records; move mode and locate mode; stream output for errors and debugging; print files; ENVIRONMENT option.


Data conversion and precision; expression evaluation, operators.

Structures and arrays

Expressions; assignments; LIKE; BY NAME; initialization.

Program logic


Program structure

Procedures; internal and external; function procedures; arguments and parameters

Condition handling

General concepts; enabling and disabling ERROR and ENDFILE etc..


Automatic; static, based; aligned and unaligned; internal and external pointers and addresses.

Built-in functions


Compiler options


Efficiency and debugging



Standards, whether general or in house, are emphasised

Testing and debugging

Compile; link edit; JCL; program execution; test data creation; error messages.

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