Learn Intercal - 10 Code Examples & CST Typing Practice Test
INTERCAL (Compiler Language With No Pronounceable Acronym) is an esoteric programming language designed to be as different from conventional languages as possible, often intentionally obscure and humorous.
Learn INTERCAL with Real Code Examples
Updated Nov 25, 2025
Learning Path
Learn INTERCAL keywords and operators
Practice writing simple output programs
Experiment with COME FROM statements
Build arithmetic and control flow examples
Explore obfuscated and humorous programming patterns
Skill Improvement Plan
Week 1: Understand syntax, operators, and PLEASE keyword
Week 2: Implement simple programs (Hello World, arithmetic)
Week 3: Use COME FROM for control flow
Week 4: Experiment with complex, obfuscated programs
Week 5: Attempt humorous or code-golf style INTERCAL programs
Interview Questions
What is INTERCAL and why was it created?
Explain Turing-completeness in INTERCAL
How does COME FROM work?
Describe role of PLEASE keyword
Compare INTERCAL to Brainfuck and Malbolge
Cheat Sheet
COME FROM - unconventional control flow
PLEASE - politeness level affecting compilation
.1, .2 - non-standard operators
FORGET - clears variables
IGNORE - used for control manipulation
Books
The INTERCAL Programming Language Handbook
Esoteric Programming Languages Explained
Obfuscated Programming with INTERCAL
Minimalist and Humorous Programming
Exercises in INTERCAL Programming
Tutorials
Hello World in INTERCAL
Arithmetic and memory cell manipulation
COME FROM control flow examples
Politeness keyword usage
Obfuscated and humorous program examples
Official Docs
https://esolangs.org/wiki/INTERCAL
https://catseye.tc/intercal/
Community Links
Esolangs.org INTERCAL page
Reddit r/esolangs
GitHub repositories with INTERCAL code
StackExchange Programming Puzzles
Online INTERCAL interpreters
Community Support
Esolangs.org INTERCAL page
Esoteric language forums
Reddit r/esolangs
GitHub repositories with sample INTERCAL programs
Online tutorials and walkthroughs
Frequently Asked Questions about Intercal
What is Intercal?
INTERCAL (Compiler Language With No Pronounceable Acronym) is an esoteric programming language designed to be as different from conventional languages as possible, often intentionally obscure and humorous.
What are the primary use cases for Intercal?
Esoteric language experimentation. Humorous programming challenges. Teaching unconventional programming concepts. Code obfuscation contests. Studying Turing-completeness in non-standard languages
What are the strengths of Intercal?
Humorous and challenging for programmers. Great for understanding Turing-completeness in absurd contexts. Encourages creative thinking about programming design. Supported by interpreters for experimentation. Strong community of esolang enthusiasts
What are the limitations of Intercal?
Extremely difficult to read and write. Not suitable for practical programming. Sparse documentation and few tutorials. Code can be intentionally nonsensical. Learning curve is steep due to unusual syntax
How can I practice Intercal typing speed?
CodeSpeedTest offers 10+ real Intercal code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.