Luz Programming Language

Luz is a lightweight, interpreted programming language written in Python. It is designed to be simple, readable, and easy to learn.

name = listen("What is your name? ")
write($"Hello {name}!")

for i = 1 to 5 {
    if even(i) {
        write($"{i} is even")
    } else {
        write($"{i} is odd")
    }
}

Why Luz?

• No boilerplate — variables need no declaration keyword, blocks use { }
• Readable syntax — keywords read like English (for i = 1 to 10, attempt / rescue)
• Full OOP — classes, inheritance, method overriding, super
• First-class functions — lambdas, closures, higher-order functions
• Helpful errors — every error includes the source line number
• Zero dependencies — just Python 3.8+

Quick Example

class Animal {
    function init(self, name) {
        self.name = name
    }
    function speak(self) {
        write($"{self.name} says hello!")
    }
}

class Dog extends Animal {
    function speak(self) {
        super.speak()
        write("(woof!)")
    }
}

d = Dog("Rex")
d.speak()

Features at a glance

Feature	Syntax
Variable	x = 10
Format string	$"Hello {name}"
For range	for i = 1 to 10 { }
For each	for item in list { }
Lambda	fn(x) => x * 2
Class	class Dog extends Animal { }
Error handling	attempt { } rescue (e) { }
Import	import "utils.luz"

Download

Download v1.8.0 for Windows

No Python required · Adds luz to your PATH

Get Started

Download the installer above, or head to Installation to run from source. Jump straight into the Language Reference to learn the syntax.