How to sort an array in a single loop?

Question

So I was going through different sorting algorithms. But almost all the sorting algorithms require 2 loops to sort the array. The time complexity of Bubble sort & Insert

Answer 1

public int find2ndLargest() {
    int[] arr = {1,3,14,25,7,20,11,30};
    int temp;

    // sort array
    for (int i=0;iarr[i+1]) {
            temp = arr[i];
            arr[i]=arr[i+1];
            arr[i+1]=temp;
            i=0;
        }
    }
    return arr[arr.length-2];
}