I/O Standard Library

The I/O standard library will be called io.

io.open(name, mode)

Opens file with name name. mode defaults to r. Modes are:

'r': read mode;
'w': write mode (clobbers file);
'a': append mode (appends to end of file);
'r+': update mode, all previous data preserved;
'w+': update mode, all previous data erased;
'a+': append update mode (same as

io.flush(f)

Saves any data written to f.

io.write(f)

Writes to f.

io.read(f)

Reads from f.

io.close(f)

Closes f.

io.seek(f, whence, offset)

Sets the position in the file

io.stdin, io.stdout, io.stderr

standard in, out and error