bubble sort time complexity

void bubbleSort(int arr[], int n)  
{  
    int i, j;  
    for (i = 0; i < n-1; i++)      
     for (j = 0; j < n-i-1; j++)  
       if (arr[j] > arr[j+1])  
            swap(&arr[j], &arr[j+1]);  
}  

O(n^2)