First Project

In this section, you will quickly create your first Jule project. You’ll learn the language details in later sections. This part is meant for a quick start and first look.

First, choose a workspace and create a main.jule file. Jule source code is written in files with the .jule extension. The compiler only works with these files. The main.jule file you create will be the file where you write your program.

When starting to learn a programming language, one of the most classic programs, perhaps the most popular, is "hello world". A simple implementation in Jule looks like this:

fn main() {
	println("hello world")
}

Once you've written your code in the main.jule file, you’re ready to compile. With the compiler, you perform package-based compilation. Packages are a core part of Jule’s project management. The directory you compile from is treated as the main package of your program.

To compile your project with the compiler, you can use a command like the following:

julec .

This command treats the . directory, meaning your current working directory, as the main package and compiles it. This build is not an optimized, production-ready build. Instead, it is a debug-oriented build you can use to test and observe your program.

By default, the compiler uses the name main. After compilation, you will have an executable file named main. When you run this file, you will see the hello world output.