5.1.4 Continuation of Long Program Statements
  If a program line is too long for one line of text, you can con-
  tinue the program line by typing an ampersand ( & ) and
  pressing Return at the end of the line. Note that only spaces
  and tabs are valid between the ampersand and the carriage
  return.

  A single statement that spans several text lines requires an
  ampersand at the end of each continued line. For example:
  OPEN "SAMPLE.DAT" AS FILE #2%, &
            SEQUENTIAL VARIABLE, &
            RECORDSIZE 80%

  In an IF...THEN...ELSE construction, ampersands (&) are
  not necessary. If a continuation line begins with THEN or
  ELSE, then no ampersand is necessary. Similarly, in a line
  following a THEN or an ELSE, there is no ampersand.
  IF (A$ = B$)
  THEN
      PRINT "The two values are equal"
  ELSE
      PRINT "The two values are different"
  END IF

  Several statements can be associated with a single program
  line. If there are several statements on one line, they must be
  separated by backslashes ( \ ). For example:
  PRINT A \ PRINT V \ PRINT G

  Because all statements are on the same program line, any
  reference to this program line refers to all three statements.