Luz Language

A lightweight, interpreted programming language designed to be simple, readable, and easy to learn.

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No Python required

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A taste of Luz

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")
    }
}

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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, and super.

🔧

First-class functions

Lambdas, closures, and higher-order functions.

🛡️

Helpful errors

Every error includes the source line number.

📦

Standard library

Math, random, I/O, system, and clock — all built in.

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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()

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Features at a glance

Feature	Syntax
Variable	x = 10
Null coalescing	x = value ?? "default"
Format string	$"Hello {name}"
List comprehension	[x * x for x in list]
Membership	3 in [1, 2, 3]
String repeat	"ha" * 3
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 "math"