# Sorting Algorithms

Learn about bubble sort, merge sort, and quicksort and how to implement them in Python.

Start## Key Concepts

Review core concepts you need to learn to master this subject

Bubble Sort Algorithm

Bubble Sort Big-O Runtime

Bubble Sort Swapping Variables

Swapping Variables in Bubble Sort

Python Swap Function

Merge Sort Merging

Big-O Runtime for Merge Sort

Merge Sort Implementation in Python

Bubble Sort Algorithm

Bubble Sort Algorithm

The Bubble Sort algorithm is a simple algorithm to sort a list of N numbers in ascending order. Bubble sort works by iterating through a list and checking whether the current element is larger or smaller than the next element.

This algorithm consists of an outer iteration and an inner iteration. In the inner iteration, the first and second elements are first compared and swapped so that the second element has a higher value than the first. This is repeated for the subsequent second and third element pairs and so forth until the last pair of (N-2, N-1) elements is compared. At the end of the inner iteration, the largest element appears last. This is repeated for all elements of the list in the outer iteration.

- 1Bubble sort is an introductory sorting algorithm that iterates through a list and compares pairings of adjacent elements. According to the sorting criteria, the algorithm swaps elements to shift …
- 2As mentioned, the bubble sort algorithm swaps elements if the element on the left is larger than the one on the right. How does this algorithm swap these elements in practice? Let’s say we have …
- 3Given a moderately unsorted data-set, bubble sort requires multiple passes through the input before producing a sorted list. Each pass through the list will place the next largest value in its prop…
- 4Bubble sort is an algorithm to sort a list through repeated swaps of adjacent elements. It has a runtime of O(n^2). For nearly sorted lists, bubble sort performs relatively few operations since it…

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