Naming ConventionsVariable names must follow these naming rules:
Procedure
Must start with a letter.
May contain letters, digits, and the underscore character (_); punctuation is not allowed. The exclamation point (!) can appear within the name as long as it is not the last character, in which case it is interpreted as a type-declaration character.
The last character of the name can be any of the following type-declaration characters: #, @, %, !, &, and $.