Question

Letter to friend is formal or informal letter​

Answer 1

Answer:

Formal letters are written for official or professional communication. On the other hand, informal letters are used for casual or personal communication. ... As against this, we use informal letters for writing letters to friends, relatives, acquaintance, etc. While writing formal letters, we use passive voice.

Answer 2

Answer:

We use informal letters for writing letters to friends.

Explanation:

Informal letters are used for casual or personal communication.