![]() Pivot selection: Pick an element, called a pivot, from the array (usually the leftmost or the rightmost element of the partition).Basically, three steps are involved in the whole process: Like all divide-and-conquer algorithms, it first divides a large array into two smaller subarrays and then recursively sort the subarrays. Quicksort is a Divide and Conquer algorithm. In the worst-case, it makes O(n 2) comparisons, though this behavior is very rare. Quicksort, on average, makes O(n.log(n)) comparisons to sort n items. In efficient implementations, it is usually not a stable sort. ![]() Quicksort is a comparison sort, meaning that it can sort items of any type for which a less-than relation is defined. ![]() Quicksort is an efficient in-place sorting algorithm, which usually performs about two to three times faster than merge sort and heapsort when implemented well. Given an integer array, sort it using the Quicksort algorithm.
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