To swap the 3ʳᵈ and 4ᵗʰ elements in the int array values, you would do:
values[3] = values[4];
values[4] = values[3];

Question

Quizplus · Accepted Answer

This code first copies values[4] into values[3] and then copies values[3] into values[4]. The result is that whatever was stored in values[4] is now stored in both values[3] and values[4]. In order to perform the swap appropriately, you would need a third variable to be used as a temporary storage location, as in
int temp = values[3];
values[3] = values[4];
values[4] = temp;

To Swap the 3ʳᵈ and 4ᵗʰ Elements in the Int