PATH programming language
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PATH is an esoteric programming language derived from the Brainfuck language. Programs are arranged on a two-dimensional grid in a manner similar to the language Befunge. Slash and backslash characters are used to direct program flow up, down, left, and right, and "arrow" characters are used to branch program flow. Data is stored in an array of integers called "memory cells", a concept also borrowed from Brainfuck.
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Sample code
The following code causes the computer terminal to beep by outputting the ASCII character 0x07 (BEL).
/*****\ /*+*\ /!*/*!\ \ # ! + // \\ * * * /**$**/ * * * * . * +-----+ + +-----+ * * * * * * \ / \ / \ /
Instructions in PATH
$ | Start at this position, heading right |
# | End program execution |
+ | Increment the current memory cell by one |
- | Decrement the current memory cell by one |
} | Change to the next memory cell |
{ | Change to the previous memory cell |
, | Input a character and store the ASCII value in the current memory cell |
. | Output the character with the ASCII value in the current memory cell |
/ |
If heading in direction: |
\ |
If heading in direction: |
^ | If the value of the current memory cell is not 0, turn up |
< | If the value of the current memory cell is not 0, turn left |
> | If the value of the current memory cell is not 0, turn right |
v | If the value of the current memory cell is not 0, turn down |
! | Skip over the next character |
Like in Brainfuck, all characters that are not a valid instruction are skipped over and ignored.
See also
- SNUSP programming language simplified Path, with a call stack
- 2L programming language: based loosely on PATH and Brainfuck, but has only two symbols.
- esoteric programming language
External links
- The official PATH website (http://pathlang.sf.net/)
- A PATH interpreter written in PHP (http://alx2002.free.fr/)ko:PATH (프로그래밍 언어)