Data types in c#

In C# data types are categories in the following types:

Value Type

Reference Type

Pointer Type

Value type – Value type variables can be assign a value directly. The following table shows the value types in c#

Type	Represents	Range	Default Value
bool	Boolean value	True or false	False
byte	8-bit unsigned integer	0 to 255	0
char	16-bit Unicode character	U +0000 to U +ffff	‘\0’
decimal	128 bit data type	-1.0 X 10-7.9X1028	0.0M
double	64 bit double-precision value	(+/-)5.0 x 10-324 to (+/-)1.7 x 10308	0.0D
float	32 bit single precision value	-3.4 x 1038 to + 3.4 x 1038	0.0F
int	32-bit signed integer type	-2,147,483,648 to 2,147,483,647	0
long	64 –bit signed integer type	-9,223,372,036,854,775,808 to 9,223,372,036,854,775,807	0L
sbyte	8-bit signed integer type	-128 to 127	0
short	16-bit signed integer type	-32768 to 32768	0

Reference Type – the reference type do not contain the data directly, while they contain the reference to the variable. The build-in reference type are : object, and string.

Object type – The object types can be assigned values of any other types, value types, reference types, when we assign value it need conversion ,conversion of value type to reference type is called boxing and reference type to value type is called unboxing.

Obj o;

O=10; this is called boxing

String Types - string type assign any string value to a variable

For Example – string s=”Dot Net darpan”;

Pointer type – pointer type variables store the address of another variable. Syntax of pointer type is given below:

type* identifier;

For Example –

Char* dotnet;

int * darpan;