Files are used to store data permanently, normally on hard drives or floppies. There are tree types of files available: text files, typed and untyped files.
Text files are used to store text in them, where typed files are
used to store many entries of the same type in them, e.g.
addresses. Text files and typed files are accessible by
Read
and Write
operations and do not need the
parameter BlockSize
in Reset
or Rewrite
.
On the other hand, untyped files are used to store any type
of information in them but you need to use BlockWrite
or BlockRead
to store or retrieve data out of this file.
var F1: Text; { a textfile } F2: file of Real; { a typed filed used to store real values in it } F3: File; { an untyped file }