function hello(){
	Var hello_world = "Hello World in Drl language\n";
	printf hello_world;
	Var preformat = "Hello with pre-formated";
	printf "%1% data\n" % preformat;
}

printf "antes do hello\n";
call hello ;
printf "depois do hello\n";

/// saida /////
[diego@localhost /usr/home/diego/Projects/Drl]$ ./drl teste.drl
antes do hello
Hello World in Drl language
Hello with pre-formated data
depois do hello