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# Java Program for Gnome Sort

• Last Updated : 04 Dec, 2018

Algorithm Steps

1. If you are at the start of the array then go to the right element (from arr[0] to arr[1]).
2. If the current array element is larger or equal to the previous array element then go one step right
```                   if (arr[i] >= arr[i-1])
i++;
```
1. If the current array element is smaller than the previous array element then swap these two elements and go one step backwards
```                       if (arr[i] < arr[i-1])
{
swap(arr[i], arr[i-1]);
i--;
}
```
1. Repeat steps 2) and 3) till āiā reaches the end of the array (i.e- ān-1ā)
2. If the end of the array is reached then stop and the array is sorted.
 `// Java Program to implement Gnome Sort`` ` `import` `java.util.Arrays;``public` `class` `GFG {``    ``static` `void` `gnomeSort(``int` `arr[], ``int` `n)``    ``{``        ``int` `index = ``0``;`` ` `        ``while` `(index < n) {``            ``if` `(index == ``0``)``                ``index++;``            ``if` `(arr[index] >= arr[index - ``1``])``                ``index++;``            ``else` `{``                ``int` `temp = ``0``;``                ``temp = arr[index];``                ``arr[index] = arr[index - ``1``];``                ``arr[index - ``1``] = temp;``                ``index--;``            ``}``        ``}``        ``return``;``    ``}`` ` `    ``// Driver program to test above functions.``    ``public` `static` `void` `main(String[] args)``    ``{``        ``int` `arr[] = { ``34``, ``2``, ``10``, -``9` `};`` ` `        ``gnomeSort(arr, arr.length);`` ` `        ``System.out.print(``"Sorted sequence after applying Gnome sort: "``);``        ``System.out.println(Arrays.toString(arr));``    ``}``}`` ` `// Code Contributed by Mohit Gupta_OMG`
Output:
```Sorted sequence after applying Gnome sort: [-9, 2, 10, 34]
```

For understanding of Arrays.toString(), Please refer :
https://www.geeksforgeeks.org/arrays-tostring-in-java-with-examples/

Please refer complete article on Gnome Sort for more details!

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