UPPER(SEXP) (STRING)

 Function
  Converts lowercase characters in a string to uppercase.

 Syntax
  UPPER(sexp)

   sexp = Any string expression.

 Return Type & Value
  STRING
  Returns sexp with all lowercase characters converted to uppercase.

 Remarks
  Although "STRING" is technically different from "string" (ie, the
  computer doesn't recognize them as being the same because one is
  uppercase and the other is lowercase), it is often necessary to save,
  display or compare information in a case insensitive format.  This
  function will return a string with all lowercase characters converted
  to uppercase.  So, using the above example, UPPER("string") would return
  "STRING".

 Examples
  STRING s
  WHILE (UPPER(s) <> "QUIT") DO
    INPUT "Text",s
    PRINTLN LOWER(s)
  ENDWHILE