How to export data from SQLplus into file

Hi, below are the guide on how to go about this trick...

Simple text

spool <filename> create;

<statement(s)>

spool off;

HTML

set markup html on

spool <filename> create;

<statement(s)>

spool off;

set markup html off

For Excel export :
http://stackoverflow.com/questions/6017863/create-an-excel-spreadsheet-from-a-oracle-database