Understanding Bubble Sort In Any Programming


You must have seen bubbles rising from the bottom of your glass numerous times! In the same way, bubbles can rise in the programming language too!


Whether we talk about Python, Java, C++ or any other programming language, bubble sort is of great help to sort the elements of the array.


It is an interesting concept to be known by every programmer. But what exactly does it mean?

If you are in search of its answer and want to enhance your understanding on the concept of bubble sorting, you have landed at the right place.

Bubble sort is defined as an algorithm which helps to arrange element or number strings in a chronological order. In this method, each adjacent element is examined carefully in a chronological order. Their positions are also checked to determine if they are in a proper sequence or not.


Understanding Bubble Sort Basics


If any programmer wants to arrange all the elements in the ascending order, from left to the right, then the bubble sort algorithm comes into being.

Firstly, an algorithm will review mainly the two items. It will arrange them in ascending form and then the cycle continues in a proper order till it is completed without switching of any numbers.



Working of Bubble Sort


Bubble sort is defined as an algorithm that works by swapping all the elements in a repeating manner. Though, this algorithm isn’t suitable for the large set of datas as certain complexities may arise.

Bubble sort algorithm works in a predetermined order. Let’s have a look on how it works:

To understand the working of bubble sort, let’s start with an unsorted array. We are going to take a short array.

7 2 9 6 4

Let’s assume that you are going to arrange all these elements in ascending order. The array has five elements which means that it is essential for you to perform or work on four comparisons. The comparison will be done by bubbling the element to the top of the array.


But why do we work on four comparisons?

N = Here N represents the number of element present in an array
N -1: It represents number of times that a comparison is occurring

So the value we get is 5 - 1 = 4


First Pass

In the first pass of bubble sort, we will compare the first element with the second one. But for that, we have to start with the first one.

Both will be swapped if the first one is greater than the second element. After that, we will compare the second element with the third one. If both of them are not in the correct series or order, they will also be swapped

7 2 9 6 4

First two will be swapped as 7 is greater.

2 7 9 6 4

No switch necessary

2 7 6 9 4

9 is greater than 6 so you have to switch.

2 7 6 9 4

9 is greater than 4 so you have to switch

2 7 6 4 9


Second Pass

In the second pass of bubble sort, the process is repeated again. Significant element among all the unsorted elements got placed at the end of iteration.

2 7 6 9 4

No switch necessary


2 7 6 4 9

7 is greater than 6 so switch is required

2 6 7 4 9

7 is greater than 4 so switch is vital

2 6 4 7 9


Third Pass

The comparison will be performed till the last unsorted element of the iteration.


2 6 4 7 9

2 is less than 6 no switch is necessary in it.

2 6 4 7 9

Switch is necessary because 6 is greater to 4

2 4 6 7 9


Fourth Pass....

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