[Type Character] %n [Format of Output] stores (in the location pointed to by the input argument) a count of the characters written so far [Input Argument] 
pointer to int
i n t e g e r
f l o a t i n g p o i n t
c h a r a c t e r
s t r i n g p o i n t e r
n o n e
p o i n t e r t o i n t
p o i n t e r