Petit Computer BASIC has two types of variables, numeric and string. String variables are identified by having a
$ symbol on the end, numeric variables do not have it.
An identifier may be up to 16 characters long (not including
$), and may consist of letters, digits, and underscores (but must not begin with a digit). Identifiers are case-insensitive. Arrays may have the same name as non-array variables, and they are considered seperate; e.g.
A(4)=10 will have no effect on the variable
For more information on value types, see the page Data types.