Basic Data Types

Data types in c++ can be classified under various categories as shown in figure.

 

• Both C and C++ compilers support all the built-in data types.
• The basic data types may have several modifiers preceding them to serve the needs of various situations.
• The modifiers signed, unsigned, modifier long may also be applied to double.
• The void have no preciding modifires.
• Data type representation is machine specific in C++.

Data Type	Size	Range
char	1 byte	-127 to 127 or 0 to 255
unsigned char	1 byte	0 to 255
signed char	1 byte	-127 to 127
int	4 byte	-2147483648 to 2147483647
unsigned int	4 bytes	0 to 4294967295
signed int	4 bytes	-2147483648 to 2147483647
short int	2 bytes	-32768 to 32767
unsigned short int	Range	0 to 65,535
signed short int	Range	-32768 to 32767
long int	4 bytes	-2,147,483,648 to 2,147,483,647
signed long int	4 bytes	Same as long int
unsigned long int	4 bytes	0 to 4,294,967,295
float	4 bytes	+/- 3.4e +/- 38    7digits
double	8 bytes	+/- 1.7e +/- 308   15digits
long double	8 bytes	+/- 1.7e +/- 308   15digits
wchar_t	2 or 4 bytes	1 wide character

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