VARIABLES
 
     Your computer uses three types of variables in BASIC. These are: normal 
     numeric, integer numeric, and string (alphanumeric) variables.
 
 NUMERIC VARIABLES
 
     Normal numeric variables, also called floating point variables, can have
     any value from ^ -38 to ^ +38, with up to nine digits of accuracy. When 
     a number becomes larger than nine digits can show, as in 10 ^ -10 or 
     10 ^ +10, your computer displays it in scientific notation form, with 
     the number normalized to 1 digit and eight decimal places, followed by 
     the letter E and the power of ten by which the number is multiplied. For
     example, the number 12345678901 is displayed as 1.23456789E+10.
 
 INTEGER VARIABLES
 
     Integer variables can be used when the number is from +32767 to -32768, 
     and with no fractional portion. An integer variable is a number like 5, 
     10, or -100. Integers take up less space than floating point variables 
     when used in an array.
 
 STRING VARIABLES
 
     String variables are those used for character data, which may contain 
     numbers, letters, and any other character that your computer can make. 
     An example of a string variable is "COMMODORE 16".
 
 VARIABLE NAMES
 
     Variable names may consist of a single letter, a letter followed by a 
     number, or two letters. Variable names may be longer than 2 characters, 
     but only the first two are significant.
     An integer variable is specified by using the percent (%) sign after the
     variable name. String variables have the dollar sign ($) after their 
     names.
 
     Examples:
 
     Numeric Variable Names: A, A5, BZ
     Integer Variable Names: A%, A5%, BZ%
     String Variable Names : A$, A5$,BZ$
 
 ARRAYS
 
     Arrays are lists of variables with the same name, using an extra number 
     (or numbers) to specify an element of the array. Arrays are defined 
     using the DIM statement, and may be floating point, integer, or string 
     variables arrays. The array variable name is followed by a set of 
     parentheses ( ) enclosing the number of the variable in the list.
 
     Examples:
 
     A(7), BZ%(11), A$(87)
 
     Arrays may have more than one dimension. A two dimensional array may be 
     viewed as having rows and columns, with the first number identifying the
     column and the second number in the parentheses identifying the row (as 
     if specifying a certain grid on a map).
 
     Examples:
 
     A(7,2), BZ%(2,3,4), A$(3,2)
 
 RESERVED VARIABLE NAMES
 
     There are seven variable names which are reserved for use by the 
     computer, and may not be used for another purpose. These are the 
     variables:

      DS  
      DS$ 
      EL  
      ER  
      ST  
      TI  
      TI$