Insertion sort and quick sort are in place sorting algorithms, as elements are moved around a pivot point, and do not use a separate array. Meanwhile, out of place sorting algorithms create a new list while sorting. These are known as in-place sorting algorithms, and require a constant O(1) extra space for sorting. The amount of extra space required: Some sorting algorithms can sort a list without creating an entirely new list.Insertion sort, merge sort, and bubble sort are stable. Unstable sorting algorithms do not maintain the order of equal values, and the output array may be. Stable sorting algorithms will maintain the order of 2a and 2b, meaning the output array will be. And to help differentiate between the two equal values, 2, let's update them to 2a and 2b, making the input array. Unstable sorting algorithms do not maintain the relative order of elements with equal values / keys.įor example, imagine you have the input array. Whether they are stable or unstable: Stable sorting algorithms maintain the relative order of elements with equal values, or keys.Finally, some sorting algorithms, such as merge sort, make use of both recursive as well as non-recursive techniques to sort the input. ![]() Other sorting algorithms, such as selection sort or insertion sort, use non-recursive techniques.
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