Basic Discussion

ANSI C supports four classes of data types.

1. Primary or Fundamental data types.

2. User-defined data types.

3. Derived data types.

4. Empty data set.

PRIMARY DATA TYPES

Integer Types

Type                         Size (bits)                      Range

int or signed int            16                        -32,768 to 32767

unsigned int                  16                            0 to 65535

short int                         8                          -128 to 127

unsigned short int         8                                0 to 255

long int                         32      -2,147,483,648 to 2,147,483,647

unsigned long int         32                           0 to 4,294,967,295

Floating Point Types

Type                                    Size(bits)                                             Range

float                                       32                                           3.4E-38 to 3.4E+38

double                                   64                                           1.7E-308 to 1.7E+308

long double                           80                                       3.4E-4932to 1.1E+4932

Character Types

Type                                  Size (bits)                                              Range

char                                       8                                                    -128 to 127

unsigned char                      8                                                       0 to 255