diff --git a/03_recursion/ES6/01_countdown.js b/03_recursion/ES6/01_countdown.js
index 4641887..b9a22f6 100644
--- a/03_recursion/ES6/01_countdown.js
+++ b/03_recursion/ES6/01_countdown.js
@@ -1,10 +1,11 @@
+/**
+ * Countdown
+ * @param {number} i Number
+ */
 const countdown = i => {
   console.log(i);
   // base case
-  if (i <= 0) {
-    return;
-  }
-
+  if (i <= 0) return;
   countdown(i - 1);
 };
 
diff --git a/03_recursion/ES6/02_greet.js b/03_recursion/ES6/02_greet.js
index ffec669..b658743 100644
--- a/03_recursion/ES6/02_greet.js
+++ b/03_recursion/ES6/02_greet.js
@@ -1,12 +1,23 @@
+/**
+ * Displays a message to the console
+ * @param {string} name Name
+ */
 const greet2 = name => console.log(`how are you, ${name}?`);
 
-const bye = () => console.log('ok bye!');
+/**
+ * Displays a message to the console
+ */
+const bye = () => console.log("ok bye!");
 
-const greet = (name) => {
+/**
+ * Displays a message to the console
+ * @param {string} name Name
+ */
+const greet = name => {
   console.log(`hello, ${name}!`);
   greet2(name);
-  console.log('getting ready to say bye...');
+  console.log("getting ready to say bye...");
   bye();
 };
 
-greet('adit');
+greet("adit");
diff --git a/03_recursion/ES6/03_factorial.js b/03_recursion/ES6/03_factorial.js
index 022a61d..74fa4dd 100644
--- a/03_recursion/ES6/03_factorial.js
+++ b/03_recursion/ES6/03_factorial.js
@@ -1,7 +1,10 @@
-const fact = (x) => {
-  if (x === 1) {
-    return 1;
-  }
+/**
+ * Consider the factorial of the number
+ * @param {number} x Number
+ * @returns {number} Result
+ */
+const fact = x => {
+  if (x === 1) return 1;
   return x * fact(x - 1);
 };
 
diff --git a/03_recursion/javascript/01_countdown.js b/03_recursion/javascript/01_countdown.js
index 529d1c8..e4208c9 100644
--- a/03_recursion/javascript/01_countdown.js
+++ b/03_recursion/javascript/01_countdown.js
@@ -1,10 +1,11 @@
+/**
+ * Countdown
+ * @param {number} i Number
+ */
 function countdown(i) {
   console.log(i);
   // base case
-  if (i <= 0) {
-    return;
-  }
-
+  if (i <= 0) return;
   countdown(i - 1);
 }
 
diff --git a/03_recursion/javascript/02_greet.js b/03_recursion/javascript/02_greet.js
index 5161a08..54ec5fd 100644
--- a/03_recursion/javascript/02_greet.js
+++ b/03_recursion/javascript/02_greet.js
@@ -1,16 +1,27 @@
+/**
+ * Displays a message to the console
+ * @param {string} name Name
+ */
 function greet2(name) {
-  console.log('how are you, ' + name + '?');
+  console.log("how are you, " + name + "?");
 }
 
+/**
+ * Displays a message to the console
+ */
 function bye() {
-  console.log('ok bye!');
+  console.log("ok bye!");
 }
 
+/**
+ * Displays a message to the console
+ * @param {string} name Name
+ */
 function greet(name) {
-  console.log('hello, ' + name + '!');
+  console.log("hello, " + name + "!");
   greet2(name);
-  console.log('getting ready to say bye...');
+  console.log("getting ready to say bye...");
   bye();
 }
 
-greet('adit');
+greet("adit");
diff --git a/03_recursion/javascript/03_factorial.js b/03_recursion/javascript/03_factorial.js
index 89b8ab7..76d46e4 100644
--- a/03_recursion/javascript/03_factorial.js
+++ b/03_recursion/javascript/03_factorial.js
@@ -1,7 +1,10 @@
+/**
+ * Consider the factorial of the number
+ * @param {number} x Number
+ * @returns {number} Result
+ */
 function fact(x) {
-  if (x === 1) {
-    return 1;
-  }
+  if (x === 1) return 1;
   return x * fact(x - 1);
 }