Getting StartedQuick Start

Quick Start

Get up and running with JOEL in 5 minutes!

Installation

First, install JOEL:

git clone https://github.com/JJ-Dynamite/JOEL.git
cd JOEL
./install.sh

See the Installation Guide for detailed instructions.

Your First Program

Create a file called hello.joel:

[Interpreted]

fn main() {
  print("Hello, JOEL!")
}

Run it:

joel run hello.joel

Output:

🚀 JOEL Runtime - Mode: Interpreted

Hello, JOEL!

Basic Syntax

Variables

[Interpreted]

let name = "JOEL"
let age = 24
let active = true

Functions

[Interpreted]

fn greet(name: str) -> str {
  return "Hello, " + name
}

fn main() {
  print(greet("World"))
}

Control Flow

[Interpreted]

let x = 10

if x > 5 {
  print("x is greater than 5")
} else {
  print("x is not greater than 5")
}

Loops

[Interpreted]

# For loop
for i in range(0, 5) {
  print("Count:", i)
}

# While loop
let count = 0
while count < 5 {
  print("Count:", count)
  count = count + 1
}

Common Commands

# Run a JOEL file
joel run program.joel
 
# Build for a target (coming soon)
joel build program.joel --target native
 
# Show version
joel version

Next Steps

InstallationYour First Program