Forms to use for Naturization

[108jam]

Hi all:

Got LPR (Green Card) more than 5 years ago.
Never left the country.
Not married to citizen.
Considering applying for citizenship but a little confused about the FORMs.
Can anyone here clarify the process from LPR to Citizenship?

Do I need the N-400?
Or N-600?
Or BOTH?

Please advise. Thanks.

[Umesh Passi]

You should apply for naturalization using Form N-400.

[108jam]

You should apply for naturalization using Form N-400.

Thanks Umesh for the reply.