Hello World |

1.3 Hello World

The following program prints "Hello World" after being compiled and run:

class Main {
  static public function main():Void {
    trace("Hello World");
  }
}

This can be tested by saving the above code to a file named Main.hx and invoking the Haxe Compiler like so: haxe -main Main --interp. It then generates the following output: Main.hx:3: Hello world. There are several things to learn from this:

Haxe programs are saved in files with an extension of .hx.
The Haxe Compiler is a command-line tool which can be invoked with parameters such as -main Main and --interp.
Haxe programs have classes (Main, upper-case), which have functions (main, lower-case).
The name of the file containing main Haxe class is the same as name of the class itself (in this case Main.hx).