Mention how to reference last element of an array

lib/Language/traps.pod

@@ -186,6 +186,21 @@ Note that this is I<also> the behaviour in Perl 5:
     perl -E "say scalar(my @array = [])"  #=> 1
     perl -E "say scalar(my @array = ())"  #=> 0
 
+=head2 Referencing the last element of an array
+
+In Perl 5 one could reference the last element of an array by asking for the
+"-1th" element of the array, e.g.:
+
+    my @array = qw{victor alice bob charlie eve};
+    say @array[-1];   #=>  eve
+
+In Perl 6 it is not possible to use negative subscripts, however the same is
+achieved by actually using a function, namely C<*-1>.  Thus accessing the
+last element of an array becomes:
+
+    my @array = qw{victor alice bob charlie eve};
+    say @array[*-1];   #=>  eve
+
 =end pod
 
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