Question about syntax of a command

[Faramir]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

Hello,
	In the hypothetical case I want to encrypt a file, using 3DES symmetric
algo, and without using asymmetric encryption (the file would just be
encrypted with 3DES and a password provided by the user), how would it
be the syntax I must enter? I read the manual, but got confused about
that...

	Best Regards
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.10 (MingW32)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/

iQEcBAEBCAAGBQJK6ywkAAoJEMV4f6PvczxA1vkH/idJj4a0qbak0L3ukaPARB5I
TTN75xGE45X2ag2GOh4UR4wTamn9/x5ukry/br1T8dQ3sZJEEx7Bg/GBz3uvi37V
1yIwTr83H/qKGofQoi+5THGDWrBFAYUYpxshIxD7p60pBYLnb3+c9Ni7XaXBNG/V
Ip20LWt+z+YuNtVRJsvrpGWnZfoWj+zKvleNti4huvlVuRb0SbEzTDPSiQHA9DU7
gm5LtKdmIM5ggwAIinlGgq4VmXIYr16VA6E5a1XhMCBtwlxWZeWvbqWX+EdwdDNV
UmHoKJxN7VU0HGtrYkZr3jTrRIee/l35mZuT25tXwDzQ6kZHyGOXa760yZZUG2o=
=Xzc5
-----END PGP SIGNATURE-----