Examples for Chapter 3 written in Perl 5 (#71)

* Create 01_countdown.pl

Recursion example #1 written in Perl 5

* Create 02_greet.pl

Recirsion example #2 written in Perl 5

* Create 03_factorial.pl

Recursion example #3 written in Perl 5

03_recursion/perl5/02_greet.pl

@@ -0,0 +1,23 @@
+sub greet2 {
+
+    my $name = shift;
+
+    print "how are you, $name ?\n";
+}
+
+sub bye { print "ok bye !\n"; }
+
+sub greet {
+
+    my $name = shift;
+
+    print "hello, $name !\n";
+
+    greet2($name);
+
+    print "getting ready to say bye...\n";
+
+    bye();
+}
+
+greet('adit');