Explicitly Define Parameters

Declare
    Procedure pShopList 
        (i_Verb     Varchar2 :='Buy'
        ,i_Item     Varchar2 :=' apples'
        ,i_Priority Varchar2 :=' now' )
      Is 
      Begin
        Dbms_Output.Put_Line(i_Verb
                           ||i_Item
                           ||i_Priority);
      End;
Begin
    pShopList(i_Item      => ' bananas' ); -- 2nd only
    pShopList(i_Priority  => ' sometime'); -- 3rd only
    
    pShopList(i_Priority  => ' sometime'
             ,i_Item      => ' grapes'  ); -- Mix
End;
/