Data Structures & Algorithms in C++ – Full Course (2025 Edition | Beginner to Advanced) - Shell Sort Algorithm (Theory + Working + Pseudocode) with Example | Part - 1 | Sorting Algorithms

Support Simple Snippets by Donations - Google Pay UPI ID - tanmaysakpal11@okicici PayPal - paypal.me/tanmaysakpal11 --------------------------------------------------------------------------------------------- Understand the working of Shell sort algorithm with example and diagram. In this tutorial we will understand in detail how shell sort works with the help of a diagram. We will also dry run the pseudo code of shell sort with an example to understand how the shell sort algorithm progresses at every step. 1) ShellSort is an in-place comparison sort. 2)It is mainly a variation of sorting by exchange (bubble sort) or sorting by insertion (insertion sort) 3) This algorithm avoids large shifts as in case of insertion sort, if the smaller value is to the far right and has to be moved to the far left. 4) The idea of shellSort is to allow exchange of far items. 5) This spacing is termed as interval or gap. 6) ShellSort is more efficient compared to Insertion Sort or Bubble sort specially when - a. Smaller value elements are towards the end of the array/list b. Large sized array/list c. Efficiency depends on how we select the GAP/interval Time Complexity - 1. Best Case - Ω(n log(n)) 2. Worst Case - O(n^2) 3. Average Case - θ(n log(n)2) Space Complexity - O(1) Working Steps - Step 1 − Initialize the value of gap/interval (here we take n/2 iteratively) Step 2 − Compare 2 elements at the distance of gap at every iteration Step 3 − if element at the left is smaller than element at the right, perform swap or shift(depending on whether you use bubble sort or insertion sort respectively) Step 3 − Repeat until complete list is sorted. Full DSA playlist - https://www.youtube.com/watch?v=XCyuHSJS7XE&list=PLIY8eNdw5tW_zX3OCzX7NJ8bL1p6pWfgG Full Code & Theory article - https://simplesnippets.tech/shell-sort-algorithm-with-c-code-sorting-algorithms-data-structures-algorithms C++ Programming Tutorials for Beginners Course - https://www.youtube.com/watch?v=AKNGgAXTark&list=PLIY8eNdw5tW_o8gsLqNBu8gmScCAqKm2Q Simple Snippets Official Website - http://simplesnippets.tech/ Simple Snippets on Facebook - https://www.facebook.com/simplesnippets/ Simple Snippets on Instagram - https://www.instagram.com/simplesnippets/ Simple Snippets on Twitter - https://twitter.com/simplesnippet Simple Snippets Google Plus Page - https://plus.google.com/+SimpleSnippets Simple Snippets email ID - [email protected] For More Technology News, Latest Updates and Blog articles visit our Official Website - http://simplesnippets.tech/ #shellsort #sortingalgorithms #datastructures #algorithms