PL/I Introductory Programming

Duration:   5 days

Participants:   Experienced programmers with a knowledge of at least one high level language, such as COBOL or C. Entry level programmers can also attend but this course does not teach programming logic or concepts.

Objectives:   Upon successful completion of this course you will be able to: -  Compile, test, and modify PL/I programs. -  Understand PL/I data formats and organization. -  Appreciate the flexibility of operational expressions and builtin functions. -  Use the control statements to create structured PL/I programs. -  Perform I/O operations using Record I/O and basic Stream I/O. -  Modularize program tasks as subroutines.

Overview:   This course introduces the programmer to the basic features of PL/I. The lecture material covers both concepts and syntax for each topic with consideration for its practical application.

Prerequisites:   Knowledge of the Operating System; TSO or CMS; and on-line source editor.

Format:   Lecture and discussion with class and hands-on exercises.

Topic Outline:   -  Program Components         Character Set         Identifiers         Statement Types         Comments         Beginning and Ending a Program -  The DECLARE Statement         Syntax and format         INITIAL attribute         Default rules -  Scalar Identifiers         Use of constants         Numeric and string data              Fixed point decimal and binary              Character and bit string              Pictures         Assignment statement rules -  Structures         Components and syntax         Accessing structure data         Relative level         Qualification of names         The LIKE attribute         Assignment by position and by name -  Arrays         Dimension attribute         Accessing arrays and array elements         Array subscript format         Assignment rules -  Arrays of Structures         Concept and syntax         Accessing one or more elements -   Expression Evaluation         Arithmetic Operations         Concatenation         Comparison         Logical Operations         Priority of Operations -  Control Statements         GOTO         IF/THEN/ELSE              Syntax and flow of control              Nested IF statements              Logical unit syntax         SELECT/WHEN/OTHERWISE              Syntax and formats              Flow of control         DO Statement              Non-iterative              TO/BY              WHILE              UNTIL              END statement              Handling array elements              Table searching         LEAVE Statement         CALL Statement              PROCEDURE syntax              Flow of control -  File Processing         File attributes         OPEN and CLOSE statements         PUT DATA and PUT LIST         Record I/O              Transmission Statements              Move Mode         Interrupts for I/O Operations         Structured Programming File Input         Producing reports using the WRITE statement -  Builtin Functions and Pseudovariables         Concept and syntax         BUILTIN attribute         Where and how used         Examples of:              SUBSTR, STRING, INDEX, VERIFY, DATE, TIME, LENGTH, ADDR, SUM, ROUND -  Compiler Options

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