Bubble sort and selection sort are the popular sorting algorithms used to arrange the elements in a specific order. Let’s discuss some major differences between bubble sort and selection sort.
What is Bubble Sort?
Bubble sort is a sorting algorithm that is used to sort the elements of a list and an array in a specific order. Basically, it compares the two adjacent elements and swaps them until they do not arrange in the intended order.
If the placement of the elements is right, then we have to move to the next iteration. Else, we can perform the swap method.
What is Selection Sort?
Selection sorting is a sorting technique that chooses the least element from an unsorted list in each loop and puts that element at the start of the unsorted list.
Difference between Bubble Sort and Selection Sort
| S.No. | Bubble Sort | Selection Sort |
| 1 | In bubble sort, we need to compare two adjacent elements. Depending on the placement of the element, we perform swapping. If the elements are placed in the correct position, we move to the next iteration. Else we perform swapping. | In selection sort, the lowest element is chosen from the list or array and switched with the element, which is placed at the beginning of the unsorted list. |
| 2 | The time complexities in Bubble sort are: For the best case -O(n)
For the worst case – O(n2). |
The time complexity for the best and worst case here is O(n 2). |
| 3 | It is less efficient as compared to the selection sort. | It is more efficient as compared to Bubble sort. |
| 4 | It prefers an exchanging method. | It prefers a selection method. |
| 5 | Bubble sorting is slower than the selection sort. | It is faster than the bubble sort. |
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