From df2775353a650ccdb48fd9862a996a7f76b3cdff Mon Sep 17 00:00:00 2001
From: Kevin Nguyen <account@kevinwin.com>
Date: Thu, 16 Jun 2016 22:37:11 -0700
Subject: [PATCH] code from chapter 3 in javascript

---
 03_recursion/01_countdown.js | 11 +++++++++++
 03_recursion/02_greet.js     | 16 ++++++++++++++++
 03_recursion/03_factorial.js |  9 +++++++++
 3 files changed, 36 insertions(+)
 create mode 100644 03_recursion/01_countdown.js
 create mode 100644 03_recursion/02_greet.js
 create mode 100644 03_recursion/03_factorial.js

diff --git a/03_recursion/01_countdown.js b/03_recursion/01_countdown.js
new file mode 100644
index 0000000..a93a3a6
--- /dev/null
+++ b/03_recursion/01_countdown.js
@@ -0,0 +1,11 @@
+function countdown(i) {
+  console.log(i);
+  // base case
+  if (i <= 0) {
+    return;
+  } else {
+    countdown(i-1);
+  }
+}
+
+countdown(5);
diff --git a/03_recursion/02_greet.js b/03_recursion/02_greet.js
new file mode 100644
index 0000000..5161a08
--- /dev/null
+++ b/03_recursion/02_greet.js
@@ -0,0 +1,16 @@
+function greet2(name) {
+  console.log('how are you, ' + name + '?');
+}
+
+function bye() {
+  console.log('ok bye!');
+}
+
+function greet(name) {
+  console.log('hello, ' + name + '!');
+  greet2(name);
+  console.log('getting ready to say bye...');
+  bye();
+}
+
+greet('adit');
diff --git a/03_recursion/03_factorial.js b/03_recursion/03_factorial.js
new file mode 100644
index 0000000..9ae69ad
--- /dev/null
+++ b/03_recursion/03_factorial.js
@@ -0,0 +1,9 @@
+function fact(x) {
+  if (x === 1) {
+    return 1;
+  } else {
+    return x * fact(x-1);
+  }
+}
+
+console.log(fact(5));