Why does bubble sort need two for loops?

The algorithm for bubble sort requires a pair of nested loops. The inner loop is executed on each iteration of the outer loop. Its purpose is to put the next largest element is being put into place. The inner loop therefore does the comparing and swapping of adjacent elements.

What can I use instead of bubble sort?

There are better sorting algorithms which you can use instead of bubble sort as they are faster than this.

1. Merge Sort.
2. Quick Sort.
3. Heap Sort.

How many loops do we need for bubble sort algorithm?

The Bubble Sort algorithm utilizes two loops: an outer loop to iterate over each element in the input list, and an inner loop to iterate, compare and exchange a pair of values in the list. The inner loop takes (N-1) iterations while the outer loop takes N iterations.

Which loop is used in bubble sort?

2 Answers. The bubble sort algorithm consist in sinking each number till it reaches its position. For doing this, the inner loop (j loop) swaps each pair of adjacents numbers.

Does selection sort require auxiliary memory?

Explanation: Auxiliary memory is required for storing the data temporarily. Explanation: Selection sort creates a sub-list, LHS of the ‘min’ element is already sorted and RHS is yet to be sorted. Starting with the first element the ‘min’ element moves towards the final element.

How is a bubble sort algorithm implemented?

Implementing Bubble Sort Algorithm

1. Starting with the first element(index = 0), compare the current element with the next element of the array.
2. If the current element is greater than the next element of the array, swap them.
3. If the current element is less than the next element, move to the next element. Repeat Step 1.

How do you create a bubble sort algorithm?

Bubble sort

1. Look at the first number in the list.
2. Compare the current number with the next number.
3. Is the next number smaller than the current number?
4. Move to the next number along in the list and make this the current number.
5. Repeat from step 2 until the last number in the list has been reached.

How does bubble sort works step by step?

A bubble sort algorithm goes through a list of data a number of times, comparing two items that are side by side to see which is out of order. It will keep going through the list of data until all the data is sorted into order. Each time the algorithm goes through the list it is called a ‘pass’.

How does the bubble sort algorithm work?

Bubble Sort is the simplest sorting algorithm that works by repeatedly swapping the adjacent elements if they are in wrong order. Example: First Pass: ( 5 1 4 2 8 ) –> ( 1 5 4 2 8 ), Here, algorithm compares the first two elements, and swaps since 5 > 1. ( 1 5 4 2 8 ) –> ( 1 4 5 2 8 ), Swap since 5 > 4.

What happens if there is no swap in bubble sort?

After an iteration, if there is no swapping, the value of swapped will be false. This means elements are already sorted and there is no need to perform further iterations. This will reduce the execution time and helps to optimize the bubble sort. Bubble Sort compares the adjacent elements.

What is the use of two nested loops in bubble sort?

Two nested loops are generally used in bubble sort implementation. Inner loop starts from the first position and checks whether the element of current position is in desired order with the next element. If not then they are swapped. Then the control moves to the next position and repeats the same thing.

How do you use bubble sort in descending order in Python?

Bubble Sort in Descending Order. To sort in descending order, > is changed to < on the comparison line of the code ie. if condition inside bubbleSort(). If the first element is smaller than the second then they are swapped else, they are not swapped. And the process goes on for remaining comparisons.