Getting Started with Lispex

Set up your Lispex development environment in 5 minutes, run your first piece of code, and experience the joy of shaping original thought.

Welcome! This guide follows the Lena Code interface flow: open → write → convert.

1) Open in your browser

URL: https://www.lenacode.com/code/
No install or login required (free).

2) Select input & output languages

In the top Input language dropdown, select Lispex.
In the top Output language dropdown, select the target language you want to convert to.

3) File naming

The first file is named LENA_001.lspx.
Each new file increments: LENA_002.lspx, LENA_003.lspx, and so on.

4) Enter code

In the left editor, type or paste the sample below.
The version/compat headers are optional.

LISPEX

;; LENA_001.lspx
;! lispex 1.1           ; optional input grammar version header
;! compat: r5rs         ; optional R5RS‑compat toggle

(define message "Hello, Lispex!")
message

5) Convert your code

Before converting, make sure your target language is selected in the Output language dropdown.
Click the Convert button to transform your code into the chosen language (among ~30 languages) following 1:1 rules.

Next steps

Explore Syntax: tokens, literals, core/derived forms, normalization rules.
Guides: Capability Modules, Target Run Tips
Open Lena Code anytime: www.lenacode.com/code/

We’re excited to see what you’ll build with Lispex.