Subtract Two Numbers - Befunge Typing CST Test
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Subtract Two Numbers — Befunge Code
Subtracts second number from first and prints it.
8 3 - .Befunge Language Guide
Befunge is a two-dimensional esoteric programming language where code flows across a grid in multiple directions, allowing self-modifying behavior and unusual program structures.
Primary Use Cases
- ▸Code-golf challenges using 2D logic
- ▸Educational demonstrations of non-linear control flow
- ▸Studying self-modifying grid-based programs
- ▸Obfuscation and creative puzzle programs
- ▸Esoteric language experimentation
Notable Features
- ▸Two-dimensional instruction execution
- ▸Self-modifying code via 'p' and 'g' instructions
- ▸Stack-based operations
- ▸Randomized flow with '?' instruction
- ▸Readable ASCII grid layout
Origin & Creator
Befunge was created in 1993 by Chris Pressey as a language intentionally difficult to compile and optimize.
Industrial Note
Befunge is mainly used in recreational programming, code-golf challenges, esolang experimentation, and demonstrations of self-modifying 2D code flow patterns.
Quick Explain
- ▸Befunge programs run on a 2D grid instead of a linear sequence.
- ▸The instruction pointer can move up, down, left, right, or randomly.
- ▸Because instructions reside on a modifiable grid, Befunge supports self-modifying code.
- ▸It is stack-based, with most operations manipulating a central stack.
- ▸Its design intentionally frustrates optimizers and traditional compilers.
Core Features
- ▸Instruction pointer moves in four directions
- ▸Grid-addressable memory for code/data
- ▸Stack manipulation for logic and math
- ▸String mode for pushing characters
- ▸Built-in I/O operations
Learning Path
- ▸Learn stack operations
- ▸Understand pointer movement
- ▸Study basic 2D program layouts
- ▸Experiment with self-modifying examples
- ▸Join code-golf challenges
Practical Examples
- ▸Hello World program
- ▸Simple math calculators
- ▸Flow-control mazes
- ▸Self-modifying demos
- ▸Randomized path generators
Comparisons
- ▸Befunge vs Brainfuck: Befunge uses 2D flow and is more visual; Brainfuck is linear and minimal.
- ▸Befunge vs Malbolge: Befunge is readable and creative; Malbolge is chaotic and nearly impossible.
- ▸Befunge vs Python: Python is structured; Befunge is playful and visual.
- ▸Befunge vs Assembly: Assembly is practical; Befunge is artistic.
- ▸Befunge vs INTERCAL: Both esoteric, but Befunge uses 2D execution.
Strengths
- ▸Visually interesting 2D code layout
- ▸Great for puzzles and creativity
- ▸Self-modifying code built-in
- ▸Compact, expressive programs
- ▸Vibrant esolang community support
Limitations
- ▸Not suitable for large applications
- ▸Hard to debug due to non-linear flow
- ▸Limited standard libraries
- ▸Hard for beginners to understand
- ▸Optimizing compilers struggle with its design
When NOT to Use
- ▸Production software
- ▸Large-scale systems
- ▸Safety-critical applications
- ▸Maintainable codebases
- ▸Performance-heavy tasks
Cheat Sheet
- ▸>: Move right
- ▸<: Move left
- ▸^: Move up
- ▸v: Move down
- ▸p/g: Modify/read grid cell
FAQ
- ▸Is Befunge free?
- ▸Yes - entirely free and open-source.
- ▸Which version should I use?
- ▸Befunge-93 for simplicity, Befunge-98 for extended features.
- ▸Can Befunge be self-modifying?
- ▸Yes, using 'p' and 'g' instructions.
- ▸Is Befunge Turing-complete?
- ▸Yes - it supports loops, conditions, and unbounded memory (in extended versions).
- ▸Are there online interpreters?
- ▸Yes - many web-based Befunge editors exist.
30-Day Skill Plan
- ▸Week 1: Basic instructions + stack practice
- ▸Week 2: Direction control and branching
- ▸Week 3: String mode + I/O mastery
- ▸Week 4: Self-modification via p/g
- ▸Week 5: Code-golf optimization
Final Summary
- ▸Befunge is a 2D esoteric language with a playful design.
- ▸Self-modifying code and multi-directional flow define its uniqueness.
- ▸Common in puzzles, challenges, and experimental computing.
- ▸Simple yet expressive stack-based instruction model.
- ▸Remains one of the most beloved esolangs.
Project Structure
- ▸src/ - Befunge (.bf) files
- ▸examples/ - sample programs
- ▸tests/ - program outputs
- ▸docs/ - instruction references
- ▸tools/ - interpreters and utilities
Monetization
- ▸Workshops or teaching content
- ▸Books on esolangs
- ▸Puzzle competitions
- ▸Code-golf sponsorship
- ▸No direct monetization usually
Productivity Tips
- ▸Use visual editors
- ▸Plan 2D flow before coding
- ▸Master stack operations
- ▸Use self-modification sparingly
- ▸Leverage direction control carefully
Basic Concepts
- ▸2D grid memory model
- ▸Instruction pointer movement
- ▸Stack manipulation
- ▸String mode pushing characters
- ▸Self-modification via 'p' and 'g'