Learn MODULA2 with Real Code Examples

Obtain a Modula-2 compiler (e.g., XDS Modula-2, GNU Modula-2)

Install compiler on your OS (Windows, Linux, or macOS)

Set environment variables for compiler paths

Compile sample modules to ensure setup

Run a simple program to verify functionality

Install Modula-2 compiler for your OS

Set environment variables for compiler paths

Create project directories for modules and binaries

Compile test modules to verify setup

Run sample programs to ensure correctness

*.mod - module implementation

*.def - module definition/interface

*.m2 - project files (compiler-dependent)

Lib/ - libraries and modules

Bin/ - compiled binaries or object files

m2c file.mod - compile module

m2link … - link modules into executable

m2run program - execute compiled program

m2doc file.mod - generate documentation

m2check file.mod - verify syntax and types

ASCII or Unicode support via compiler

Manual handling of text and localization

Resource files for messages (custom implementations)

No built-in i18n libraries

Used mostly in academic context with simple output

Readable syntax for beginners

Strong typing reduces programming errors

Clear separation of modules

Teaching-friendly for structured programming

Limited modern tooling or IDE support

No built-in GUI support

CLI or embedded system interfaces only

Output formatting via text I/O

External libraries may provide GUI

Focus on structured code and modularity

Variables scoped to modules or procedures

Constants for immutable values

Encapsulation via exported/imported symbols

Pointer-based references for dynamic data

Module-level initialization routines

Primitive types: INTEGER, BOOLEAN, REAL, CHAR

Structured types: ARRAY, RECORD, SET

Pointers for dynamic memory

I/O through standard libraries

Module-level constants and global variables