22.2. Banking Example: Rule in Example1.drl

rule "Rule 01"   
    when
        eval( 1==1 )
    then
        System.out.println( "Rule 01 Works" );
end

Output:

Loading file: Example1.drl
Rule 01 Works

This rule has a single eval condition that will always be true, so that this rule will match and fire after it has been started.
The output shows the rule matches and executes the single print statement.