![]() ![]() This means that the time it takes to run the algorithm is the square of the size of the input array, otherwise known as Quadratic Time. As a result, if memory is extremely scarce, selection sort would be a better choice than mergesort. So the idea is that while insertion sort causes the ith element to sink down, and bubble sort causes it to bubble up, insertion sort doesnt cause it to drop to the very bottom, it just causes it to drop into the right position in the already-sorted section. Selection sort depends on the same factors as Bubble Sort and like Bubble Sort, it also has a Big O time complexity of O(n²) on average. However, there are two areas in which selection sort might be better: Selection sort on an array can be implemented with O (1) auxiliary storage space, whereas (most) implementations of mergesort on arrays use (n) auxiliary storage space. ![]() Once the inner loop completes we compare the current index to the low indexes value and if the current item is larger, we swap the two. ![]() If we do find a value that is less than the current one, we set the low variable equal to that index. On each iteration, we loop from the current elements adjacent element forward and look ahead for a value that is lower than the current one, if we don't find one, the inner loop continues until it is complete. In this implementation we loop the array which is to be sorted into a new array which initially contains the items of the input array, this is assigned to the variable output. Enter fullscreen mode Exit fullscreen mode ![]()
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