SELECT CASE variable-name

   Synopsis:
      Initiates a SELECT CASE code block

   Notes:
      A compact way of writing code that would otherwise have to be written as a
         series of IF, ELSE IF and ELSE statements.
      Only constants (and not variables) can be used in the subsequent CASE
         statements.

   Availability:
      SELECT is not available in scripts with primitive line numbers.

   Examples:
      SELECT CASE dice
         CASE 1
            PRINT "The lowest number!"
         CASE 3, 4
            PRINT "Somewhere in the middle!"
         CASE 6
            PRINT "The highest number!"
         CASE ELSE
            PRINT "Some other number!"
            IF dice = 5 THEN PRINT "It's a five!" ELSE PRINT "It's a two!"
      END SELECT
