Is It Necessary To put comma(,) in letter. If Yes Then Where is it necessary in both the letters. [While Answering Keep in Mind I m Talking To regards with X th std ICSE BOARDS EXAMINATION]. Plz Provide perfect and correct answers as i m going to appear for boards very soon. Plz Provide justification if u can. THANKX IN ADVANCE!!!!!



In ur address all the three lines should have comma
in formal in the subject there should be a full stop 
yours faithfully and yours affectionately and comma
your name and full stop
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Can u give some salutations too
for informal - hope this letter finds u in the best of health possible
for formal - i regret to tell u that
Lets talk about this in chats
You need to put a comma three times in any kind of letter.
1. In between the date, For example:- 23rd january,2013
2. After the salutation. For example:- Dear Priya,
3. At the end. For example:- Your most obedient student,
                                                  Shreya Dash
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plz mark as the best if it helped u