# Shell Sort in Java2 min read

In this tutorial, we will learn how to implement Shell Sort in java. First, we will start by understanding the Shell Sort algorithm.

## ShellSort Algorithm

Shell sort is an in-place comparison-based sorting algorithm and variation of Insertion sort. It is a better version of Insertion sort in comparison-based. It can compare the elements far apart whereas Insertion compares adjacent elements.

In shell sort, we make the array h-sorted for a large value of h. We keep reducing the value of h until it becomes 1. An array is said to be h-sorted if all sublists of every h’th element are sorted.

## Time Complexity of Shell Sort:

• Best case:  `0(nlogn)`
• Average case:  `0(n(logn)^2)`
• Worst case:  `0(n(logn)^2)`

Before we begin, you need to have an idea of the following:

## Implementation of Shell sort in java

The output of shell Sort Algorithm in java:

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