What is formal and informal letter? 

 Formal and informal letters are very different or we can say opposite of each other. In on our school most of the time we need to write it for that we should know first what is FORMAL and INFORMAL. 

So today we will know about formal and informal letters in brief very nicely. 

Formal letters are those letters which we write to school principal to any manager to any officer formality formality we just directly right personal matter suggestion advice waiting your friend family member parents big brother sister grandpa etc. 

So first of all what is formal. 

formal means whenever we behave professionally we are uniform properly talk with others in for my way is called formal. 

and

 informal means whenever we meet to our friends to our parents and talk with them personally without any Foundation limitation is called informal. 

So what does it mean :

Formal letters are those letters which we write to school principal to any manager to any officer formality formality we just directly right personal matter suggestion advice waiting your friend family member parents big brother sister grandpa etc.

Format of formal letter and informal letter. :

Formal letter 

Send address 

date 

receiver address 

subject : purpose of writing

 letter 

Respected Sir /man

 content 

your sincerely 

your name

Informal letter 

Sender address

 date 

dear father /mother /sister 

 content

 your lovely son /daughter 

your name