Printf Formatting

%d %i   Decimal signed integer.
%o      Octal integer.
%x %X   Hex integer.
%u Unsigned integer.
%c Character.
%s String. See below.
%f double
%e %E   double.
%g %G   double.
%p      pointer.
%n Number of characters written by this printf. 

No argument expected.
%%  %. No argument expected.