How to write informal letter to a friend​

Réponse:

you just have to say what you want because his your friend

Réponse :

If it is a friend or someone close to your age you can greet them by their first name, like “Dear Alex”.

and to knew how to write a good one u should :

   Begin the letter with a salutation. ...

   Explain yourself. ...

   Start with a question. ...

   Share news. ...

   Make it interesting. ...

   Ask more questions. ...

   Compose the last paragraph. ...

   Choose a proper closing.

i hope that i helped u :)