How to implement "if/then/else" or "case" logic in a Statement Expression?

Question

I need a loop in my test sequence, so I define a Locals.LoopIndex which is of type Number, and I also define a Locals.PromptMessage, which is of type String. Within the loop body, have a statement step, in which I want to assign Locals.PromptMessage different strings according to the value of Locals.LoopIndex. The logic is like this (in suedo code)
case Locals.LoopIndex:
1: Locals.PromptMessage = "string1";
break;
2: Locals.PromptMessage = "string2";
break;
or
if (Locals.LoopIndex == 1)
then Locals.PromptMessage = "string1";
else if (Locals.LoopIndex == 2)
then Locals.PromptMessage = "string2";
How can I implement this in the Statement Expression?
Thanks!

Answer 1

You can use the conditional expression (not sure what it is called). Syntax is Locals.variable=(BooleanExpression?ValueIfTrue:ValueIfFalse). To implement your pseudo code it would look like this:
Locals.PromptMessage=(Locals.LoopIndex==1?"string1":"string2")
This means the same as:
If Locals.LoopIndex=1 then
Locals.PromptMessage = "string1"
Else
Locals.PromptMessage = "string2"
End If
Another way to do it is like this, but the first method is preferred:
Locals.LoopIndex==1?(Locals.PromptMessage="string1")Locals.PromptMessage="string2") -- must use parenthesis as shown
This syntax is BooleanExpression?(Statement if BooleanExpression is true)Statement if BooleanExpression is false)
You can nest the expression to create ElseIf conditions:
Locals.PromptMessage=(Locals.LoopIndex==1?"string1"Locals.LoopIndex==2?"string2":"string3"))
This means the same as:
If Locals.LoopIndex=1 then
Locals.PromptMessage = "string1"
ElseIf Locals.LoopIndex=2 then
Locals.PromptMessage = "string2"
Else
Locals.PromptMessage = "string3"
End If
I don't know if there is a limit to the nesting.
Hope this helps.
- tbob
Inventor of the WORM Global