What is the correct way to swap the values of variables From and To using a temporary variable?

The process of swapping the values of two variables, From and To, using a temporary variable is achieved by correctly assigning values in a specific sequence. The correct choice involves first storing one of the variable values in a temporary variable before overwriting it.

In the correct method, you start by assigning the current value of From to a temporary variable, temp. This preserves the original value of From. Next, you set the value of From to the value of To, effectively overwriting it. Finally, you assign the value originally stored in the temporary variable (which is the original value of From) to To. This sequence ensures that no data is lost during the swap process.

Specifically, the operations are:

1. var temp = from; – Here, the current value of From is saved into temp.

2. from = to; – The value of To is then assigned to From.

3. to = temp; – Finally, the original value of From (stored in temp) is assigned to To.

This sequence successfully swaps the values without losing any information, which is why this approach is recognized as correct.