Adds definition of methods and examples refs #2624

Author: JJ

doc/Type/Label.pod6

@@ -6,8 +6,10 @@
 
     class Label {}
 
-In Perl 6, you can give for example loops a label, and use it to control that
-loop (instead of the inner-most loop).
+Labels are used in Perl 6 to tag loops so that you can specify the one you want
+to jump to with statements such as C<last>. You can use it to jump out of loops
+and get to outer ones, instead of just exiting the current loop or going to the
+statement before.
 
 =begin code :skip-test<compile time error>
 USERS:          # the label
@@ -21,10 +23,43 @@ for @users -> $u {
 say USERS.^name;        # OUTPUT: «Label␤»
 =end code
 
-Those label are objects of type C<Label>.
+Those label are objects of type C<Label>, as shown in the last statement. Labels
+can be used in any loop construct, as long as they appear right before the loop
+statement.
+
+=begin code
+my $x = 0;
+my $y = 0;
+my $t = '';
+A: while $x++ < 2 {
+    $t ~= "A$x";
+    B: while $y++ < 2 {
+        $t ~= "B$y";
+        redo A if $y++ == 1;
+        last A
+    }
+}
+say $t; # OUTPUT: «A1B1A1A2»
+=end code
+
+Putting them on the line before the loop or the same line is optional.
 
 =head1 Methods
 
+=head2 method name
+
+Defined as:
+
+    method name()
+
+Not terribly useful, returns the name of the defined label:
+
+    A: while True {
+      say A.name; # OUTPUT: «A»
+      last A;
+    }
+
+
 =head2 method next
 
 Defined as: