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ZBasic Language Reference 5 ZX Microcontroller Family This conveys the idea that the either the keyword Public or the keyword Private may be present but it is also permissible for neither to be present. In other cases, there may be a set of elements from which exactly one must be chosen. {Public | Private | Dim} <name> As <type> The curly braces indicate that one of the keywords Public, Private or Dim must precede the <name> element. In various places in this document you will find a text box with information about BasicX compatibility. Most often, the text will describe how some particular feature is different when the BasicX compatibility mode is enabled. In a few instances, the text will describe how ZBasic is fundamentally different from BasicX. This information is most useful to those who are upgrading to ZBasic from BasicX. If that is not the case for you, you may safely ignore such information.