In an informal letter can we use interrogative sentences such as, ' How are you ' - English - Informal Letters

Question

In an informal letter can we use interrogative sentences such as, '
How are you?'

Kavin · Accepted Answer

Yeah you can use these type of phrases As you are writing to your
friend/relative you are allowed to use it

In an informal letter can we use interrogative sentences such as, ' How are you?'