The Essence of COBOL Programming
Step into the world of enterprise tech and learn the language that powers banking, finance, and government systems around the globe. Whether you’re brand-new to coding or leveling up your professional skills, this course makes COBOL simple, practical, and exciting to learn.
Overview
Welcome to “The Essence of COBOL Programming” Course!
Your first step into the world of enterprise programming.
Whether you’re brand-new to programming or expanding your technical skills, this course will guide you step-by-step into understanding and writing COBOL, one of the most reliable and widely used languages in banking, finance, and government systems today.
COBOL is known for its clarity, its long-term stability, and its role powering critical systems across the world. By the end of this course, you’ll not only understand COBOL, you’ll be able to write, compile, test, debug, and run your own programs with confidence.
What You Will Learn
In this course, you will master:
- The structure and anatomy of a COBOL program
- Variables, data types, and PIC clauses
- Working with files, records, and data operations
- Compiling, running, and debugging using GnuCOBOL
- Best practices for testing and structuring COBOL applications
- Real-world programming patterns and mini-projects
Each topic is explained in a friendly, step-by-step manner with practical exercises.
How the Course Works
This course is designed to be:
- Beginner-friendly: No prior coding experience required.
- Hands-on: You will write actual COBOL programs from Day 1.
- Guided and Structured: Each module builds on the previous one, so you always know exactly what to do next.
- Practical: Examples reflect the kinds of programs still found in enterprise systems.
What You Need Before You Start
To get the most out of this course, make sure you have:
- Basic computer skills
- A willingness to learn the Terminal/Command Prompt
- GnuCOBOL installed (we’ll show you how!)
- A text editor (VS Code recommended)
- Curiosity and patience — COBOL rewards both
Course Structure
Here’s a quick overview of what’s ahead:
- Module 1: Introduction to COBOL Programming
- Module 2: How to Compile, Test, and Debug a COBOL Program
- Module 3: Report Programs and Output Handling
- Module 4: How to Design, Code, and Test a Structured COBOL Program
- Module 5: Using COBOL Features for Structured Coding
- Module 6: Other Ways to Define, Move, and Initialize Fields
- Module 7: Working With Files and Records in COBOL
- Module 8: Introduction to JCL for COBOL Beginners
- Module 9: Subprograms & Modularization
- Module 10: Real-World COBOL Projects
Each lesson includes explanations, examples, challenges, and quizzes.
What You Should Do First
- Read the COBOL Environment Basics
- Install GnuCOBOL
- Set up your project folder
- Say hello in the course community or comment section
- Start with Module 1: Terminal Basics
Our Commitment to You
We want you to succeed. By the end of this course, you will:
- Understand COBOL fundamentals
- Build working programs on your own
- Be comfortable debugging and testing
- Gain confidence in reading and writing enterprise-style COBOL code
You’re not just learning a language, you’re learning a skill that powers the world’s largest industries.
Ready? Let’s Begin!
Curriculum
- 12 Sections
- 63 Lessons
- 90 Days
- COBOL Environment Basics2
- Module 1 — Introduction to COBOL Programming6
- 2.1Lesson 1: What COBOL Does in Enterprise Systems?
- 2.2Lesson 2: COBOL Divisions Overview
- 2.3Lesson 3: How COBOL Works on Modern Platforms
- 2.4Lesson 4: Checkpoints – A Framework for Accountability
- 2.5Hands-On Activity: Setting Up Your COBOL Programming Environment
- 2.6Quiz: Introduction to COBOL Programming33 Questions
- Module 2 — How to Compile, Test, and Debug a COBOL Program6
- 3.1Lesson 1: Anatomy of a Simple COBOL Program
- 3.2Lesson 2: Compiling with GnuCOBOL (cobc commands)
- 3.3Lesson 3: Running COBOL Programs from the Terminal
- 3.4Lesson 4: Debugging Techniques
- 3.5Lesson 5: Best Practices for Testing COBOL Programs
- 3.6Quiz: Compiling, Running, Debugging & Testing COBOL Programs30 Questions
- Module 3 — Writing a COBOL Program That Prepares a Report7
- 4.1Lesson 1: Understanding Report-Style Programs
- 4.2Lesson 2: Using DISPLAY, WRITE, and File Output
- 4.3Lesson 3: Formatting Lines and Columns
- 4.4Lesson 4: Generating Totals and Subtotals
- 4.5Lesson 5: End-of-Report Logic
- 4.6Quiz: Report Programs and Output Handling30 Questions
- 4.7Hands-On-Activity: Building Your First File-Driven Sales Report in COBOL
- Module 4 — How to Design, Code, and Test a Structured COBOL Program6
- 5.1Lesson 1: Understanding Structured COBOL (no GO TO)
- 5.2Lesson 2: Top-Down Design and Modular Paragraphs
- 5.3Lesson 3: PERFORM Statements (inline and out-of-line)
- 5.4Lesson 4: Program Design Tools (flowcharts, pseudocode)
- 5.5Lesson 5: How to Structure, Test, and Refactor COBOL Programs
- 5.6Quiz: Building Maintainable COBOL Programs Through Structure, Testing, and Refactoring40 Questions
- Module 5 — Using COBOL Features for Structured Coding6
- 6.1Lesson 1: IF / ELSE / END-IF — Decision Making in COBOL
- 6.2Lesson 2: EVALUATE — COBOL’s Multi-Branch Decision Tool
- 6.3Lesson 3: PERFORM – Repeating Logic the Right Way in COBOL
- 6.4Lesson 4: TABLE (Arrays) – Structured Data Handling in COBOL
- 6.5Lesson 5: Validating Input Data in COBOL
- 6.6Quiz: Using COBOL Features for Structured Coding41 Questions
- Module 6 — Advanced Data Handling and Definitions in COBOL7
- 7.1Lesson 1: Advanced Data Definition (REDEFINES, RENAMES)
- 7.2Lesson 2: Understanding Group Items and Elementary Items in COBOL
- 7.3Lesson 3: MOVE CORRESPONDING (MOVE CORR) — Smart, Name-Based Data Copying
- 7.4Lesson 4: Resetting and Clearing Data in COBOL
- 7.5Lesson 5: VALUE Clause — Preloading Data the Smart Way
- 7.6Lesson 6: DISPLAY, COMP, and COMP-3 — Numeric Data Types in COBOL
- 7.7Quiz: Advanced Data Handling and Definitions in COBOL40 Questions
- Module 7 — Working With Files and Records in COBOL10
- 8.1Lesson 1: File Processing and Types of Files in COBOL
- 8.2Lesson 2: Understanding Sequential Files in COBOL
- 8.3Lesson 3: READ — Reading Records from a Sequential File in COBOL
- 8.4Lesson 4: WRITE — Writing Records to a Sequential File in COBOL
- 8.5Lesson 5: Understanding Relative and Indexed Files in COBOL
- 8.6Lesson 6: REWRITE — Indexed & Relative File Updates in COBOL
- 8.7Lesson 7: DELETE — Indexed & Relative Files Record Removal in COBOL
- 8.8Lesson 8: Understanding File Status Codes in COBOL
- 8.9Lesson 9: Mastering SORT and MERGE in COBOL
- 8.10Quiz: Working With Files and Records in COBOL40 Questions
- Module 8 — JCL Made Simple: The Gateway to COBOL Execution7
- 9.1Lesson 1: Understanding JCL and Batch Jobs in the Mainframe Environment
- 9.2Lesson 2: Understanding DD Statements in JCL (Data Definition Statements)
- 9.3Lesson 3: Compiling and Running COBOL Programs on z/OS (Two-Step Job Workflow)
- 9.4Lesson 4: Your First COBOL Run Job — The Simplest JCL Possible
- 9.5Lesson 5: How to Complete the Hands-On Activity Without Access to z/OS, JCL, or a COBOL Compiler
- 9.6Hands-On Activity: Compile and Run Your First COBOL Program
- 9.7Quiz: JCL Made Simple40 Questions
- Module 9 — Calling Subprograms in COBOL6
- 10.1Lesson 1: How CALL and LINKAGE Really Work?
- 10.2Lesson 2: Passing Parameters – BY CONTENT vs. BY REFERENCE
- 10.3Lesson 3: Program Stitching in JCL Execution Chains
- 10.4Hands-On Activity: Build Your First JCL Execution Chain
- 10.5Lesson 4: Returning Values from COBOL Subprograms
- 10.6Quiz: Subprograms & Modularization20 Questions
- Module 10 — Real-World COBOL Projects3
- Knowledge Stack6
- 12.1Mastering COBOL I/O Reserved Words with Flashcards
- 12.2Learning COBOL Structural Reserved Words with Flashcards
- 12.3Building Logic Skills with COBOL Conditional Reserved Word Flashcards
- 12.4Strengthening COBOL Skills with Arithmetic & Data-Manipulation Reserved Word Flashcards
- 12.5The COBOL Word Challenge!
- 12.6The COBOL Hangman Challenge!






