Operator Scope of Action:
Operator First Added:
The concatenation operator, + (plus sign character), joins the strings/references/expressions before and after it. Thus, the expression
$FullName = $FirstName+" "+$LastName;
evaluates a first name "Jane" and last name "Doe" to give a string value "Jane Doe" for the FullName attribute.
The + (plus sign) character is also used for numerical addition. Depending on context, Tinderbox will decided which operation is intended by the + sign. This is a very good reason to always enclose literal text strings in quotes.