Open source · MITv0.1.0-37

Pseudo-code
that runs.

AlgoLab is a French pseudo-code interpreter built for algorithmics students and teachers. Write your algorithm exactly the way it's taught in class — and execute it.

Download AlgoLab Read the documentation→

No Python install. One binary for Linux, Windows and macOS.

bonjour.algo

Variable nom : Caractere
Variable age : Entier

Debut
  Ecrire "Comment tu t'appelles ?"
  Lire(nom)
  Ecrire "Quel age as-tu ?"
  Lire(age)

  Si age >= 18 Alors
    Ecrire "Bienvenue ", nom, " ! Tu es majeur."
  Sinon
    Ecrire "Salut ", nom, " ! Encore ", 18 - age, " ans a attendre."
  FinSi
Fin

Why AlgoLab

The missing link between the blackboard and the screen

Before AlgoLab, pseudo-code stayed on paper. Not anymore.

Native French pseudo-code

Variable, Si, TantQue, Pour, Ecrire, Lire — exactly the syntax taught in class. No mental translation to Python or Java.

Zero friction, single binary

Download, run. No Python install, no dependencies. .deb, .exe, macOS binary — that's it.

Explicit, pedagogical errors

No cryptic stack trace. AlgoLab tells you "missing ALORS keyword after condition" and points to the exact line.

Built-in VS Code extension

Syntax highlighting, snippets, one-click execution, real-time diagnostics. A complete environment.

Open source, community-driven

MIT licensed, transparent code. Fork it, contribute, integrate it into your school freely.

Cross-platform

Linux (.deb), Windows (.exe), macOS. Distribute to students whatever their machine.

Before and after AlgoLab

The difference is in the execution — literally.

Without AlgoLab

Pseudo-code stays on paper
Mentally translate to Python to test
Cryptic errors in English
Python install + dependencies

With AlgoLab

Pseudo-code runs directly
You write the exact syntax from class
Pedagogical errors in French, line by line
One binary, it just works

Pedagogical diagnostics

Errors that teach

Three categories of errors, all phrased so a beginner gets it.

erreur.algo

Variable x : Entier
Debut
  x <- 10
  Si x > 5
    Ecrire "x est grand"
  FinSi
Fin

$ algolab erreur.algo

Erreur Syntaxique (Ligne 4, Colonne 12)

mot-cle ALORS manquant apres la condition.

→ ajoutez « Alors » apres la condition pour corriger.

VS Code Extension

A pro editor for pseudo-code

Syntax highlighting, snippets, integrated execution, real-time diagnostics. Everything you'd expect from a modern programming environment — built for algorithmics.

Type algo + Tab to scaffold a full program
▶ Run button right in the toolbar
Auto-validation on save
Red squiggles for errors with hover messages

Built for three audiences

🎓

Students

Test your pseudo-code from session one. Understand your mistakes thanks to clear French messages.

👩‍🏫

Teachers

Demo algorithms live in class. Hand out .algo files as exercises and grade them in person.

🛠️

Curious devs

A simple, readable, open-source mini-language. Perfect for exploring language design.

Pseudo-codethat runs.