Types

Basic data types for variables

Type	Description
char	single character, one byte
int	integer
float	single-precision floating point
double	double-precision floating point

Additional qualifiers

Qualifier	Type	Description
short	short int	short integer, not longer than integer
	short	short integer, not longer than integer
long	long int	long integer, not shorter than integer
	long	long integer, not shorter than integer
	long double	long double, not shorter than double
signed	signed char	signed character, value between -128 and 127
	signed integer	signed integer
unsigned	unsigned char	unsigned character, value between 0 and 255
	unsigned integer	unsigned integer

• define the meaning of bytes in memory

• define which machine instructions to use on certain operations

• implicit conversion rules between variables of different type

• printable characters are always positive

• watch out on PC's or 64 bit machines