INSERTION SORT - TIME COMPLEXITY


Time complexity of insertion Sort

 To compute the runtime, it is quite easy when we realise that we run through each of the elements in the array and so, the runtime is a function of the number of elements, n. Further we notice that for each of the n elements when we take it, we move to the left, element by element making comparisons which at worst case, is that we run through n-1 elements which is approximately another n.
 Thus,
  Total runtime= O(n×n) = O(n^2)

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