I am trying to evaluate 2 expressions. What is the best way to do this?

Could I use an If...Then statement, like this?

If (FirstVar >= 1) AND (FirstVar <= 500) Then
Response.Write "The first variable is fairly small"
End If

Can I use a Do...While statement, like this?

Do While (varCounter <= FirstVar) AND (FirstVar <= 500)
varCounter = varCounter + 100
Loop

If these are not good, then what should I use instead? Please help!

Thanks,
WebGrrl

It depends on what you want to evaluate and the amount of variables your trying to evaluate. Can you be a little more specific?

Either example there could work, but it depends on what you're trying to do.

I'm trying to see if a number is between two numbers. I realize that I can only evaluate one expression at a time (i.e., I know that I can't do this: y > z > 4).

My asp book says that If...Then statements can only evaluate one expression, but the code seems to work, so I am wondering if the code is inefficient? Is there a better way to evaluate 2 expressions?

Thanks,
WebGrrl

The first example would be efficient

an IF statement can only evalute a single expression but as you can see expressions can be joined with logical operators (AND, OR, XOR) and paranthesis can be used for the evaluation order

it's ((y > z) and (z > 4)) BTW If my boolean algebra is up to speed

Ahhh, thank you, good to know.

WebGrrl

You don't need the brackets at all in your particular if statement, as in most if statements. The only time you need them is if you're comparing using different logical operators and you need to group them.

For example:

if FirstVar >= 1 and FirstVar <= 500 then

would be sufficient.

However, let's say you wanted to see if your number fell within one of two ranges:

if FirstVar >=1 and FirstVar <=500 or FirstVar >= 1000 and FirstVar <=5000 then

That wouldn't work because it would look for a number that was at least 1000 and no more than 500. There's no such animal.

That's where you need the brackets.

if (FirstVar >=1 and FirstVar <=500) or (FirstVar >=1000 and FirstVar <=5000) then

This would search for a number that's either between 1 and 500 or between 1000 and 5000.

This is rather abstract and confusing at first, but once you use the brackets a few times it will make some sense.

Use the IF statement. Do-WHILE is for looping and what you have it not a loop.