Learn Pli - 10 Code Examples & CST Typing Practice Test
PLI (Programming Language One) is a procedural, compiled language designed for business and systems programming, particularly for large-scale data processing and legacy IBM mainframe environments.
Learn PLI with Real Code Examples
Updated Nov 21, 2025
Learning Path
Understand mainframe environment and JCL
Learn basic PLI syntax and procedures
Practice arrays, records, and tables
Develop small batch processing programs
Study legacy systems and integration patterns
Skill Improvement Plan
Week 1: PLI syntax and variable types
Week 2: Arrays, records, and tables
Week 3: Procedures and modular routines
Week 4: Batch job creation and execution
Week 5: Enterprise mainframe application maintenance
Interview Questions
What is PLI and what was it designed for?
How does PLI differ from COBOL and FORTRAN?
Explain structured programming in PLI.
What are the typical applications of PLI?
How do you maintain legacy PLI systems?
Cheat Sheet
DECLARE x FIXED BIN(31); - declare integer variable
DECLARE rec RECORD (field1 FIXED BIN(31), field2 CHAR(10));
PROCEDURE name(); - define procedure
IF condition THEN … ELSE … ENDIF; - conditional
DO i = 1 TO 10; … ENDDO; - loop
Books
Programming in PL/I / PLI by IBM
Structured Programming with PLI
Enterprise Batch Processing with PLI
Mainframe Systems Programming with PLI
Legacy IBM Software Development Practices
Tutorials
PLI syntax and variable types
Procedures, records, and tables
Loops and conditionals
File and batch processing
Developing enterprise mainframe applications
Official Docs
IBM PL/I Language Reference
IBM mainframe PLI compiler manuals
Enterprise batch processing documentation
Community Links
IBM mainframe forums and user groups
Legacy enterprise system communities
Archived PL/I/PLI tutorials
Corporate mainframe teams
University archives for legacy programming
Community Support
IBM legacy programming forums
Mainframe and enterprise user groups
University archives with PLI documentation
Internal corporate mainframe teams
Historical programming resources
Frequently Asked Questions about Pli
What is Pli?
PLI (Programming Language One) is a procedural, compiled language designed for business and systems programming, particularly for large-scale data processing and legacy IBM mainframe environments.
What are the primary use cases for Pli?
Large-scale batch processing. Business and financial systems. Mainframe application maintenance. Data processing for enterprises. Legacy system integration and updates
What are the strengths of Pli?
Highly reliable for business-critical applications. Optimized for IBM mainframes. Structured syntax reduces errors. Good for batch and report processing. Supports modular programming with procedures
What are the limitations of Pli?
Mainframe-dependent and outdated for modern platforms. Limited modern tooling or IDE support. Not suitable for web, mobile, or GUI applications. Smaller community compared to modern languages. Steeper learning curve for new programmers
How can I practice Pli typing speed?
CodeSpeedTest offers 10+ real Pli code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.