sort an array

int arr[6] = {6, 3, 9, 5, 1, 2};
int temp;
for (int i = 0; i < 6; i++) {
  for (int j = i; j < 6; j++) {
    if (arr[i] < arr[j]) {
      temp = arr[i];
      arr[i] = arr[j];
      arr[j] = temp;
    }
  }
}