BubbleSort Average Case



Time complexity : O(N^2)
If arr[j] is greater than arr[j+1] then swap these adjacent elements, else move on


// C program for implementation of Bubble sort
#include <stdio.h>
 
void swap(int* xp, int* yp)
{
    int temp = *xp;
    *xp = *yp;
    *yp = temp;
}
 
// A function to implement bubble sort
void bubbleSort(int arr[], int n)
{
    int i, j;
    for (i = 0; i < n - 1; i++)
 
        // Last i elements are already in place
        for (j = 0; j < n - i - 1; j++)
            if (arr[j] > arr[j + 1])
                swap(&arr[j], &arr[j + 1]);
}
 
/* Function to print an array */
void printArray(int arr[], int size)
{
    int i;
    for (i = 0; i < size; i++)
        printf("%d ", arr[i]);
    printf("\n");
}
 
// Driver program to test above functions
int main()
{
    int arr[] = { 5, 1, 4, 2, 8 };
    int n = sizeof(arr) / sizeof(arr[0]);
    bubbleSort(arr, n);
    printf("Sorted array: \n");
    printArray(arr, n);
    return 0;
}



P.S.


BubbleSort Worst Case



Time complexity : O(N^2)
The worst-case condition for bubble sort occurs when elements of the array are arranged in decreasing order.