Hello, world!

Now that you’ve installed jank, it’s time to write your first jank program. Following tradition, we’ll write a trivial program which prints Hello, world! to the screen.

Project directory setup

jank doesn’t require any particular directory structure. It can work with files directly. However, in order to keep our systems clean, we’ll create a new project directory for this example. Run these commands in a terminal.

$ mkdir -p ~/projects/hello_world
$ cd ~/projects/hello_world

Next, use your text editor to create a file called hello.jank in the hello_world directory. The contents should look like this.

(println "Hello, world!")

Finally, we can run this file!

$ jank run hello.jank
Hello, world!