How to iterate variable number arguments array?

Example:

Method Execute (args...) As %Status {
...
 #dim statement as %SQL.Statement
 set statement = ##class(%SQL.Statement).%New(2)
 set statement.%Dialect = "CACHE"
 do statement.prepare(query)

 #dim rs as %SQL.StatementResult
 set rs = statement.execute(args...)

My questions are: 1) how do I get the size of args **2) how to get all values of **args **3) is it possible to modify the **args?