Thursday, July 18, 2024
HomeAlgorithmsBubble Sort Kotlin Implementation - Sorting Algorithms #2

# Bubble Sort Kotlin Implementation – Sorting Algorithms #2

-

Bubble Sort is the simplest Algorithm of all the sorting techniques. It compares two adjacent elements and swaps them if they are in wrong order. In this article we will focus on Bubble Sort Kotlin Implementation

#### How Bubble Sort Works?

Bubble sort works by iterating through the array of N elements, from the first element to the last, comparing each adjacent elements and swapping them if they are in wrong order. Once an iteration is completed, last element is in sorted position and we will start another iteration through N-1 elements. Enough of the theory, let’s dive into the Bubble Sort Kotlin Implementation Algorithm

#### Bubble Sort Kotlin Algorithm

This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.

 package main.dataStructures.sorting fun main(args: Array) { var numSwaps = 0 var isSorted = false val str = readLine()!! val intList: ArrayList = ArrayList(str.split(" ").map { it.toInt() }) //1) read values and convert them to arraylist var lastUnsorted = intList.size – 1 // 2) to keep the track of unsorted array while (!isSorted) { isSorted = true for (i in 0 until lastUnsorted) { if (intList[i] > intList[i + 1]) { swapValues(intList, i, i + 1) numSwaps++ isSorted = false // 3) making this as false whenever the swap needs to be performed. } } lastUnsorted–// 4) decreasing the count since one more element from right side is placed in sorted position } for(i in intList) { println(i) } } fun swapValues(list: ArrayList, a: Int, b: Int) { val temp = list[b] list[b] = list[a] list[a] = temp }

view raw

BubbleSort.kt

hosted with ❤ by GitHub

#### Things to Explain from Above Algorithm

Let us briefly discuss the points which are commented and are worth mentioning from the above algorithm.

1. Read values and convert them to arraylist: As usual, we will read input from the console using readLine()Â method and convert it to arraylist in this line of code.
2. To keep the track of unsorted array:Â Earlier we mentioned that for each iteration, the respective last element in the iteration gets sorted. So from next iteration onwards, we will iterate through 0 to (last element-1). This variable helps tracking that.
3. Making this as false whenever the swap needs to be performed:Â Here isSorted is being made as false because we identified adjacent items that needs to be swapped. If any iteration is such that no adjacent items needs to be swapped, then that means the total array is sorted. Otherwise we will make isSorted = false so that it is ready for next iteration.
4. Decreasing the count since one more element from right side is placed in sorted position:Â As mentioned in point 2, we are decreasing the count as the last element of the iteration is sorted and in next iteration we can ignore that last element.

1. Simplest form of all sorting, easy to understand

1. Bit Expensive. Average and Worst case complexity is O(n2).

In the next articles, we will be discussing another interesting sorting algorithm techniques like Merge sort.

Want to improve this article / contribute new articles ? Reach us at –Â http://13.126.215.213.xip.io/test/write-an-article/

This site uses Akismet to reduce spam. Learn how your comment data is processed.

### Single Number | Leetcode 136 | 100 Days of Code Day 9

Welcome to Day 9 of Coderefer's 100 Days of code where we will be solving problems from Coderefer DSA sheet each day and today we...

### 3 Sum | Leetcode #15 | 100 Days of Code Day 10

Today we are going to solve 3 Sum - our first Medium Level Array problem from Coderefer DSA Sheet. If you are new to this...

### Best Time to Buy and Sell Stock – Day 7 | 100 Days of Code

Welcome to Day 7 of 100 Days of Code where today we solve yet another most frequently asked easy array problem called - Best Time...

### Contains Duplicate – Day 8 | 100 Days of Code

Welcome to Day 8 of 100 Days of Code and today we are going to solve yet another easy-level problem - Contains Duplicate as part...

1,358Fans
10Followers
397Subscribers