# What is the best case of bubble sort algorithm?

## What is the best case of bubble sort algorithm?

The best case for bubble sort occurs when the list is already sorted or nearly sorted. In the case where the list is already sorted, bubble sort will terminate after the first iteration, since no swaps were made.

## What is the best and worst case of bubble sort?

Bubble sort has a worst-case and average complexity of О(n2), where n is the number of items being sorted. Most practical sorting algorithms have substantially better worst-case or average complexity, often O(n log n). When the list is already sorted (best-case), the complexity of bubble sort is only O(n).

What is the best case time complexity of bubble sort algorithm?

Difference between Selection, Bubble and Insertion Sort

Selection Bubble
Best case time complexity is O(n2) Best case time complexity is O(n)
Works better than bubble as no of swaps are significantly low Worst efficiency as too many swaps are required in comparison to selection and insertion
It is in-place It is in-place

Why is best case of bubble sort O n?

In this link https://techdifferences.com/difference-between-bubble-sort-and-selection-sort.html it says that the best case of bubble sort is order of n due to the fact that there would be only comparisons and no swaps in the inner loop.

### Why is bubble sort the worst?

Though bubble sort is simple and easy to implement, it is highly impractical for solving most problems due to its slow running time. It has an average and worst-case running time of O ( n 2 ) O\big(n^2\big) O(n2), and can only run in its best-case running time of O ( n ) O(n) O(n) when the input list is already sorted.

### How long does bubble sort take?

A desktop PC these days can do a billion (109) little things in about 5 seconds. A bubble sort on 106 random ints requires about 1012 little things, or about 5000 seconds = 83 minutes.

Which is better bubble or insertion sort?

On average, the bubble sort performs poorly compared to the insertion sort. Still, the bubble sort algorithm is favorable in computer graphics. It’s suitable for cases where we’re looking for a small error or when we have almost sorted input data. All in all, insertion sort performs better in most cases.

What are the disadvantages of bubble sort?

Disadvantages of the Bubble Sort The main disadvantage of the bubble sort method is the time it requires. With a running time of O(n^2), it is highly inefficient for large data sets. Additionally, the presence of turtles can severely slow the sort.

#### What is the worst case of bubble sort?

Recall that if the random element is placed at the end, bubble sort loses its efficiency because each element greater than it must bubble all the way up to the top. The absolute worst case for bubble sort is when the smallest element of the list is at the large end.

#### What is the difference between bubble sort and insertion sort?

The main difference between bubble sort and insertion sort is that bubble sort performs sorting by checking the neighboring data elements and swapping them if they are in wrong order while insertion sort performs sorting by transferring one element to a partially sorted array at a time. An algorithm is a sequence of steps to solve a problem.

What is the best time complexity of bubble sort?

The best case for bubble sort is when the elements are already sorted. The usual implementation gives O(n^2) time complexity for best, average, worst case. We can modify the bubble sort by checking if array is sorted or not(a swap would indicate an unsorted array) at every iteration.

What is the efficiency of bubble sort?

The Efficiency of Bubble Sort. The Bubble Sort algorithm contains two kinds of steps: Comparisons: two numbers are compared with one another to determine which is greater. Swaps: two numbers are swapped with one another in order to sort them.