Type  Bytes  Bits                Range

short int    2      16          -32,768 -> +32,767          (16kb)    unsigned short int    2      16                0 -> +65,535          (32Kb)          unsigned int    4      16                0 -> +4,294,967,295   ( 4Gb)                   int    4      32   -2,147,483,648 -> +2,147,483,647   ( 2Gb)              long int    4      32   -2,147,483,648 -> +2,147,483,647   ( 2Gb)           signed char    1       8             -128 -> +127         unsigned char    1       8                0 -> +255                 float    4      32                double    8      64           long double   12      96 from:

http://www.lix.polytechnique.fr/~liberti/public/computing/prog/c/C/CONCEPT/data_types.html