Data Types

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C language is rich in its data type.

Data type tells the type of data, that you are going to store in memory.

It gives the information to compiler that how much memory ( No. of bytes ) will be stored by the data.

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I. Primitive Data Types :

Type	Size	Description
char	1 byte	Used for characters or integer variables.
int	2 or 4 bytes	Used for integer values.
float	4 bytes	Single precision floating point values.
double	8 bytes	Double precision floating point values.

In addition to these data types, some of them may be used with a modifier that affects the characteristics of the data object. These modifiers are listed in Table.

Modifiers :

Modifier	Description
long	Forces a type int to be 4 bytes (32 bits) long and forces a type double to be larger than a double (but the actual size is implementation defined). Cannot be used with short.
short	Forces a type int to be 2 bytes (16 bits) long. Cannot be used with long.
unsigned	Causes the compiler (and CPU) to treat the number as containing only positive values. Because a 16-bit signed integer can hold values between – 32,768 and 32,767, an unsigned integer can hold values between 0 and 65,535. The unsigned modifier can be used with char, long, and short (integer) types.

The essence of all the data types that we have learnt so far has been captured in Table.