Can I get the name of a String or a Alterable Value mixing letters and numbers?

Use the the buttons in the expession window called "Val" and "Str$"
"Val" is for for converting string to number
"Str$" is for converting number to string.

Are you trying to write string to the array or a value to the array?
Is the "Attribute value" a number or a string showing a number?

If "Attribute value" is a string and you want it to be converted to a number + another number and then record it to a number array then do this:

Str$( "Attribute value ) + number

Ahh, I understand now.

You want to use:

"Attribute " + Str$( >Enter number here< )

However I don't think you can pick an object by its name. I really wish that a feature like that was in Fusion 2.5, but I cant seem to find it.

If you choose to do: string$( "Attribute " + Str$( value( "Counter" ) ) ), you get a syntax error.

I'm not sure what you are using all those strings for, but what you can do instead is using only 1 string object but adding paragraphs to it and then set the paragraph number to what you want the string to show.

If im not missunderstanding this...
You could retrieve an Alteable Value/ String based on its 'Index'.

So if your AltVal list is ordered correctly

AltValue1 ( Index1 )
AltValue2 ( Index2 )
altValue3 ( Index3 )
etc

you could just referrance the Index which would directly relate to the LoopIndex, if that makes sense.

"For example: I want to record in an array the value of String called "Attribute + String $ (4)"

So lets say you have theese AlterableStrings, and lets give them a value for the purpose of this example:

NameS_ = Barro
LocationS_ = Elswhere
ClothesS_ = Pants
EyesS_ = Blue

All the AlterableStrings are Indexed (not sure if its0 or 1 bases, but well go for 0 based for the sake of the example ):

NameS_ ( Index 0 )
LocationS_ ( Index 1 )
ClothesS_ ( Index 2 )
EyesS_ ( Index 3 )

Now, you can run a Loop "a"

Example:
+ On "a"
-> Add AterableString with Index = Index of loop "a", to Array ( X=0 , Y= Index of loop "a" )

^
This will make your Array look something like this:

Barro ( X0, Y0 )
Elswhere ( X0, Y1 )
Pants ( X0, Y2 )
Blue ( X0, Y3 )

...
I sounded to me like this was what you were after, but i might be misstaken

The first AltValue/ AltString in the list has Index 0
The second AltValue/ AltString in the list has Index 1
and so on

Here is how you get the index of an AltValue/ AltString:

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( It annoys me that the imagesturn out so big on the screen. If i resize, using Paint, the text gets distorted )