Hello World!

int main (string[] args) {
Gtk.init (ref args);

var window = new Gtk.Window ();
window.title = "Hello World!";
window.border_width = 12;
window.window_positi
window.set_default_size (350, 70);
window.destroy.connect (Gtk.main_quit);

 var butt Gtk.Button.with_label ("Click me!");
button.clicked.connect (() => {
button.label = "Hello World!";
button.set_sensitive (false);
});
window.add (button);
window.show_all ();

Gtk.main ();
return 0;

}

And I got 2 errors

francisco@eos:~$ cd /home/francisco/Projects/gtk-hello/src
francisco@eos:~/Projects/gtk-hello/src$ valac --pkg gtk+-3.0 gtk-hello.vala
gtk-hello.vala:8.7-8.7: error: syntax error, expected `;'
window.set_default_size (350, 70);
      ^
gtk-hello.vala:11.11-11.13: error: syntax error, expected `;'
 var butt Gtk.Button.with_label ("Click me!");
          ^^^
Compilation failed: 2 error(s), 0 warning(s)
francisco@eos:~/Projects/gtk-hello/src$