From f6cb264c686bb899db1e7f16fb1da55f4dddbc8c Mon Sep 17 00:00:00 2001
From: Leon Rische <hello@l3kn.de>
Date: Thu, 3 Mar 2016 15:19:05 +0100
Subject: [PATCH] code for chapter 3 in ruby

---
 03_recursion/ruby/01_countdown.rb | 12 ++++++++++++
 03_recursion/ruby/02_greet.rb     | 16 ++++++++++++++++
 03_recursion/ruby/03_factorial.rb |  9 +++++++++
 3 files changed, 37 insertions(+)
 create mode 100644 03_recursion/ruby/01_countdown.rb
 create mode 100644 03_recursion/ruby/02_greet.rb
 create mode 100644 03_recursion/ruby/03_factorial.rb

diff --git a/03_recursion/ruby/01_countdown.rb b/03_recursion/ruby/01_countdown.rb
new file mode 100644
index 0000000..d28b3b1
--- /dev/null
+++ b/03_recursion/ruby/01_countdown.rb
@@ -0,0 +1,12 @@
+def countdown(i)
+  puts i
+  # base case
+  if i <= 0
+    return
+  # recursive case
+  else
+    countdown(i - 1)
+  end
+end
+
+countdown(5)
diff --git a/03_recursion/ruby/02_greet.rb b/03_recursion/ruby/02_greet.rb
new file mode 100644
index 0000000..200d4e1
--- /dev/null
+++ b/03_recursion/ruby/02_greet.rb
@@ -0,0 +1,16 @@
+def greet2(name)
+  puts "how are you, #{name}?"
+end
+
+def bye
+  print "ok bye!"
+end
+
+def greet(name)
+  puts "hello, #{name}!"
+  greet2(name)
+  puts "getting ready to say bye..."
+  bye
+end
+
+greet("adit")
diff --git a/03_recursion/ruby/03_factorial.rb b/03_recursion/ruby/03_factorial.rb
new file mode 100644
index 0000000..a5c0a99
--- /dev/null
+++ b/03_recursion/ruby/03_factorial.rb
@@ -0,0 +1,9 @@
+def fact(x)
+  if x == 1
+    1
+  else
+    x * fact(x - 1)
+  end
+end
+
+puts fact(5)