Executing this script:

Dim value, string
Dim ok, boolean

Set value, "1.0"

IsEqual value, "X", ok

Exit

I obtain a "Type mismatch" error on the "IsEqual" statement.
I suppose that this statement "thinks" that "value" is a number because it has a numeric value.
How can I check a string variable that could have a numeric value?

Any ideas?

You are correct, 1.0 is atomatically casted as a number. Because of that you get "Type mismatch" error.

A simple workaround is to prefix strings with some text character before doing the comparision, for example

Concat "a", value, value
IsEqual value, "aX", ok

: Executing this script: Dim value, string
: Dim ok, boolean

: Set value, "1.0"

: IsEqual value, "X", ok

: Exit

: I obtain a "Type mismatch" error on the "IsEqual"
: statement.
: I suppose that this statement "thinks" that "value" is a
: number because it has a numeric value.
: How can I check a string variable that could have a numeric value?

: Any ideas?