Size and Range of Basic Data Types in C Language

Size and Range of Basic Data Types

Data Type	Range of Values
char or signed char	-128 to 127
unsigned char	0 to 255
int or signed int	-32768 to 32767
unsigned int	0 to 65536
long int	-2,147483,648 to + ..47
float	3.4e-38 to 3.4e+38
double	1.7e-308 to 1.7e+308

Floating Point Types

• They are stored in 32 bits in all 16 or 32 bit machines with 6 digits of precision
• Double provides more accuracy than float
• It uses 64 bits giving a precision of 14 digits
• It represents the same data type as float but with double precision, hence double
• To extend the precision further, one may use long double with 80 bits