SD - read()

Read from the file. read() inherits from the Stream utility class.

Syntax, len)


  • file: an instance of the File class (returned by
  • buf: an array of characters or bytes.
  • len: the number of elements in buf.


When used as The next byte (or character), or -1 if none is available.

When used as, len): The amount of bytes read, or -1 if an error occurred.

See also