Can there be a while loop inside a for loop?

The loop which contains a loop inside a loop is known as the nested loop. It can contain the for loop inside a for loop or a while loop inside a while loop. It is also possible that a while loop can contain the for loop and vice-versa.

What is the big O complexity of a while loop?

So it is O(1). If the number of iterations depends on some value(linearly), say the number of items(n) of an array or list, it will have O(n) complexity. That is, the time for execution varies depending on the input size(n).

What is the complexity of nested for loop?

The time complexity of nested loops is equal to the number of times the innermost statement is executed. In the above nested-loop example, the inner loop is running n times for every iteration of the outer loop.

Is O n2 bad?

It all depends on data. For bubble sort O(n^2) is worst-case scenario. It can be as good as O(n) if you are sorting already sorted list. Generaly O() means worst-case scenario for given algorithm.

What is the big O of looping through an array and printing out each element?

The big O of a loop is the number of iterations of the loop into number of statements within the loop.

What will be the complexity of two n times nested loop?

The two loops here are nested, but the number of iterations the inner loop runs is independent of the outer loop. Within EACH iteration, the inner loop iterates n times, independent of the outer loop. Therefore, the time complexity of this code fragment is O(n log n).

Why is a nested for loop O N 2?

This code takes O(N) time, where N is the length of the array. This code counts how many times the product of two integers within a sorted array is within the array. This code will take O(N^2 log N) time. That’s because the for loops go through O(N^2) iterations, and each iteration does an O(log N) search.