Basic Looping

[rdove]

This tutorial is going to cover simple looping with ASP. If you have ever used Visual Basic then a lot of this will look very fimilar because it is essentially the same.

First I will talk about a for...next loop. For...Next loops are good when you want to increment by numbers. For example:

Dim i

For i = 0 to 10
  response.write(i)
Next

This will write out all the numbers from 0 to 10, then the loop will break.

Next is the While loop. A while loop will process until the condition returns false.

Dim i

i = 0

While i < 10
  response.write(i)
  i = i + 1
Wend

In this instance numbers 0 to 9 will be outputted on the page. Since i needs to be less than 10 after 9 is reached the loop will break because it has returned false.

Next we have the Do loops. There are 2 types of Do loops: Do...While & Do...Until. Do...While Loops are similar to While loops, they will process until the condition is false.

Do While i < 10
  response.write(i)
  i = i + 1
Loop

On the Otherhand, a Do...Until loop will process until the condition is met or true.

Do Until i = 10
  response.write(i)
  i = i + 1
Loop

That is a short basic tutorial on the types of loops that can be used in ASP.

Tutorial written by:
Ryan Wischmeyer 2004, Indianapolis, IN