Add day 31

Author: MadhavBahl

Diff for: day30/JavaScript/binary.js renamed to day30/JavaScript/naive.js

@@ -1,6 +1,6 @@
 ![cover](./cover.png)
 
-# Day 29 - Search and Sort Algorithms Part C: Naive Pattern Search
+# Day 30 - Search and Sort Algorithms Part C: Naive Pattern Search
 
 So this week is for searching and sorting algorithms, and we did linear search and binary search yesterday, and today's algorithm would be the Naive Search.
 

Diff for: day30/README.md

@@ -0,0 +1 @@
+// to be added

Diff for: day30/cover.png

@@ -0,0 +1,28 @@
+![cover](./cover.png)
+
+# Day 31 - Search and Sort Algorithms Part D: Bubble Sort
+
+Now that we've seen some searching algorithms, it's time we proceed with the sorting algorithms. Whenever we look at sorting algorithm, the first algorithm that comes to mind is the easiest one, the bubble sort algorithm, and hence today, we'll be doing the bubble sort.
+
+"Bubble Sort is the simplest sorting algorithm that works by repeatedly swapping the adjacent elements if they are in wrong order." -- (source: GeeksForGeeks)
+
+## Question
+
+Given an unsorted list of elements, write a program to sort the given list using bubble sort.
+
+**Example**
+
+```
+input: [1, 8, 3, 2, 9, 5, 4]
+output: [1, 2, 3, 4, 5, 8, 9]
+```
+
+![ques](./ques.png)
+
+## Solution
+
+### [JavaScript Implementation](./JavaScript/binary.js)
+
+```js
+to be added
+```