! creat sequential text file val.dat
! stop writing with a "."
! see Chapter 9 for details
LET name$ = "val.dat"
OPEN #200: name name$, create newold
ERASE #200
LINE INPUT input$
DO until input$ = "."
PRINT #200:input$
LINE INPUT input$
LOOP
PRINT "file is written"
CLOSE #200
END