INTERCAL, short for Compiler Language With No Pronounceable Acronym, was created in 1972 by Don Woods and James Lyon at Princeton University. INTERCAL is an esoteric programming language designed as a parody of contemporary languages like Fortran and COBOL, intentionally difficult to read and write. It is primarily used for educational purposes, programming humor, and exploring the limits of language design. Developers can access INTERCAL through the official site: INTERCAL Official Site, which provides compilers for Unix-like systems and source code for experimentation.
INTERCAL exists to challenge conventional programming paradigms and demonstrate how language design can be taken to absurd extremes. Its philosophy emphasizes obfuscation, unpredictability, and humor. By intentionally avoiding conventional structures and using confusing syntax, INTERCAL solves the "problem" of creating a language that is virtually unreadable, highlighting the importance of readability and design in conventional programming languages.
INTERCAL: Hello World
INTERCAL programs are built around unusual keywords, strange punctuation, and nonstandard control structures. Even a simple "Hello World" is deliberately verbose.
PLEASE NOTE THAT THIS PROGRAM IS A JOKE
DO ,1 <- #13
PLEASE DO ,1 SUB #1 <- #238
DO ,1 SUB #2 <- #108
DO ,1 SUB #3 <- #112
DO ,1 SUB #4 <- #0
PLEASE READ OUT ,1This snippet demonstrates how assignments and output require verbose, counterintuitive commands. It conceptually mirrors esoteric approaches in languages like Brainfuck or Whitespace.
INTERCAL: Control Flow
INTERCAL uses nontraditional flow control, such as COME FROM statements and conditional branching with unusual syntax.
DO .1 <- #0
COME FROM .1
PLEASE DO .2 <- #1
PLEASE DO .3 <- #2
DO .1 <- .2 + .3Control flow in INTERCAL is intentionally confusing, making programs hard to trace. This is conceptually similar to the absurd flow in Brainfuck or the symbolic operations in Befunge.
INTERCAL: Data Representation
INTERCAL handles data with 16-bit integers and unusual operators like ~ and ? for bitwise manipulation, emphasizing obfuscation over practicality.
DO ,1 <- #255
DO ,2 <- ~ ,1
DO ,3 <- ? ,1
PLEASE READ OUT ,2
PLEASE READ OUT ,3Bitwise operations are nonstandard and rely on peculiar syntax. This is conceptually similar to minimalistic esoteric manipulation in Brainfuck or Befunge.
INTERCAL: Output and Interaction
INTERCAL uses verbose and idiosyncratic output statements, requiring multiple layers of commands even for simple tasks.
DO ,1 <- #72
DO ,2 <- #101
DO ,3 <- #108
DO ,4 <- #108
DO ,5 <- #111
PLEASE WRITE OUT ,1
PLEASE WRITE OUT ,2
PLEASE WRITE OUT ,3
PLEASE WRITE OUT ,4
PLEASE WRITE OUT ,5This output system illustrates the parody nature of the language. It is conceptually similar to the deliberately minimal I/O in Brainfuck or the esoteric character manipulation in Befunge.
INTERCAL serves as a humorous, thought-provoking tool in computer science, highlighting the extremes of language design and obfuscation. Its unconventional syntax, confusing flow control, and verbose structure make it a landmark in esoteric programming. When studied alongside Brainfuck, Befunge, and Whitespace, INTERCAL offers insight into the playful, absurdist side of programming and the boundaries of computational expression.