How to save Admin FTP password

Every time I attempt to upload a plugin or theme, I am asked for the FTP password. Is there a way to save this within WordPress, or do I have to enter it every time? Thanks.

You can save this information on your wp-config.php file:

define('FTP_HOST', 'ftp_host');
define('FTP_USER', 'ftp_username');
define('FTP_PASS', 'ftp_password');

More info (WordPress Codex)