pugs> for zip(@names; @ages) -> ($n,$a)  {say  "   $n is $a old; "}
   Jack 20 is Emma 19 old;
   Robert 35 is  old;
undef
pugs> for @names Z @ages -> ($n,$a)  {say  "   $n is $a old; "}
   Jack 20 is Emma 19 old;
   Robert 35 is  old;
undef
pugs> for @names Z @ages -> ($n;$a)  {say  "   $n is $a old; "}
   Jack 20 is Emma 19 old;
   Robert 35 is  old;
undef
pugs> for @names Z @ages -> $n,$a  {say  "   $n is $a old; "}
   Jack 20 is Emma 19 old;
   Robert 35 is  old;
undef
pugs> for @names Z @ages -> $n;$a  {say  "   $n is $a old; "}
   Jack 20 is Emma 19 old;
   Robert 35 is  old;
undef