What is the difference between selection sort and bubble sort in C language?

Two common sorting algorithms are selection sort and bubble sort, and their differences mainly manifest in the following aspects:

1. Comparison times: The comparison times in selection sort are fixed, requiring n(n-1)/2 comparisons regardless of the input data order, where n is the length of the sequence to be sorted. In contrast, the comparison times in bubble sort are dependent on the order of the input data. If the input data is already sorted, only n-1 comparisons are needed.
2. The number of swaps: The number of swaps in selection sort is fixed, requiring n-1 swaps regardless of the order of the input data. In contrast, the number of swaps in bubble sort depends on the order of the input data. If the input data is already sorted, no swaps are required.
3. Stability: The selection sort method is an unstable sorting algorithm, meaning equal elements may change their relative order after sorting. Bubble sort, on the other hand, is a stable sorting algorithm where the relative order of equal elements remains unchanged after sorting.
4. The time complexity of the selection sort and bubble sort algorithms is O(n^2) on average and in the worst-case scenario, where n is the length of the sequence being sorted. However, the best-case time complexity for selection sort is O(n), while for bubble sort it is also O(n).

To sum up, there is a slight difference between selection sort and bubble sort in terms of comparison and exchange iterations. Selection sort performs slightly better than bubble sort, but bubble sort is a stable sorting algorithm suitable for scenarios where stability is a priority.