Question

1. Under what circumstances is it best to use a VBScript Select Case statement for decision-making?

2. What VBScript loop structures are tested at the top? What VBScript loop structures are tested at the bottom?

Answer 1

1.

When you need to check for many different cases on one variable you could create a large number of ElseIf statements, but this is actually very inefficient. Without getting to specific, it takes VBScript a great deal of computing power to check all these different ElseIf statements. Also, this kind of coding reduces human readability. Because of these problems another programming method, the Select Case statement, was created to solve this problem.

2.

Loops with the test at the top of the loop (while and for loops) are called top-driven loops.

Loops implemented with the test at the bottom (a do loop) are called bottom-driven loops.