NSLog(@"%d", somenumber);

%@     Object
%d, %i signed int
%u     unsigned int
%f     float/double
 
%x, %X hexadecimal int
%o     octal int
%zu    size_t
%p     pointer
%e     float/double (in scientific notation)
%g     float/double (as %f or %e, depending on value)
%s     C string (bytes)
%S     C string (unichar)
%.*s   Pascal string (requires two arguments, pass pstr[0] as the first, pstr+1 as the second)
%c     character
%C     unichar
 
%lld   long long
%llu   unsigned long long
%Lf    long double