XCODX |

Vyxal Online Compiler & Interpreter

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About Vyxal

The newest heavyweight of the golfing scene, Vyxal emerged in 2020 from a team of Code Golf Stack Exchange members led by lyxal, explicitly designed to combine the best ideas of its predecessors. It is stack-based like 05AB1E but borrows functional elements, lambdas, and vectorization conventions from across the family, wraps them in a 256-character codepage, and adds quality-of-life features its designers wished older languages had, including readable keyword aliases and generous implicit behavior. Development has been unusually community-driven, with major redesigns argued in public and a large built-in library that keeps growing. XCODX runs the interpreter in a real interactive terminal, so codepage programs execute live and stdin is typed as the program waits, with zero setup.

Hello World in Vyxal

`Hello, World!`
How it works: backticks delimit a Vyxal string literal, which is pushed onto the stack, and the top of the stack is printed implicitly when the program ends. Golfed answers shrink this further with Vyxal's string compression, encoding both words in a few codepage bytes.

When to use Vyxal

Vyxal is a first-class competition language across the board: strings fall to its compression, math to vectorized built-ins, and list challenges to lambda-and-map structures shorter than most rivals'. It is also arguably the friendliest entry point into codepage golfing, since its documentation, element search tools, and active chat community were built with newcomers in mind, and its design discussions double as an education in what two decades of golfing languages have learned.

Common questions

How does Vyxal differ from Jelly and 05AB1E?

Vyxal is deliberately synthetic: it takes 05AB1E's stack model and string compression, gestures toward Jelly's compositional power through lambdas and modifier elements, and adds its own conveniences like context variables and flexible implicit output. Being newer, it also iterated on community feedback in real time. Byte counts across the three are close, with winners varying by challenge domain.

Do I have to memorize the whole codepage to start?

No. Most newcomers begin with a small core, string literals, arithmetic, a map lambda, and implicit output, and look up everything else in the element list as needed. The official site's searchable element reference and the community's habit of posting explained answers mean you can decode any existing solution symbol by symbol while learning.

How does Vyxal handle input?

Implicitly, in the family tradition: inputs are read and supplied automatically when elements need operands the stack cannot provide, and they cycle if a program requests more than were given. Explicit input elements and command-line flags adjust parsing and evaluation. Under the XCODX terminal, a program awaiting stdin pauses live until you type, matching local interpreter behavior.

How Vyxal runs on XCODX

Sandbox filename
main.vyx
Entry point
single main source file
Editor grammar
plain text — no highlighter ships for this language
Reading stdin
no standard input construct
Input delivery
live WebSocket stream
Prompt flushing
flush manually before reading input
Compile limit
10 s
Run limit
3 s batch · up to 3 min live
Memory
256 MB per stage
Max source
50,000 characters

Default program on this page

`Hello from Vyxal!`