Quicksort is a popular and efficient sorting algorithm that follows the divide-and-conquer strategy to sort an array or list of elements. It was developed by Tony Hoare in 1960. Quicksort works as follows: Choosing a Pivot: Quicksort begins by selecting a "pivot" element from the array. The pivot is used to divide the array into two subarrays: elements less than the pivot and elements greater than the pivot. Partitioning: The array is partitioned into two subarrays: one containing elements less than the pivot and the other containing elements greater than the pivot. Elements equal to the pivot can go in either subarray, depending on the specific implementation. Recursion: Quicksort is applied recursively to both subarrays created in the previous step. This means that each of these subarrays is sorted using the same Quicksort algorithm. Combine: Once all the subarrays are sorted, you combine them to obtain the final sorted array. The elements are now in their correct positions, with those less than the pivot to the left and those greater than the pivot to the right. The pivot [red] compares to the elements [yellow] within the sublists defined by the blue lines.