![]() Then, 3 is inserted between 2 and 5, resulting in 23514 ![]() Here is an example: for sorting the array the array 52314įirst, 2 is inserted before 5, resulting in 25314 What this means in practice is that the sort iterates down an array, and the part of the array already covered is in order then, the current element of the array is inserted into the proper position at the head of the array, and the rest of the elements are moved down, using the space just vacated by the element inserted as the final space. Insertion sort does exactly what you would expect: it inserts each element of the array into its proper position, leaving progressively larger stretches of the array sorted. The multiplication works out so that the efficiency is n*(n/2), though the order is still O(n^2). The first loop goes from 0 to n, and the second loop goes from x to n, so it goes from 0 to n, then from 1 to n, then from 2 to n and so on. Here is the code for a simple selection sort: Because a selection sort looks at progressively smaller parts of the array each time (as it knows to ignore the front of the array because it is already in order), a selection sort is slightly faster than bubble sort, and can be better than a modified bubble sort.
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