C# Data Types

    

The Microsoft .NET Framework provides a robust system of primitive types to store and represent data in your application. Data types represent integer numbers, floating-point, numbers and non-numeric types. 

•  Integer Types

Type	Visual C# Name	Description	Range
System.Byte	byte	8-bit unsigned integer	0 to 255
System.Int16	short	16-bit signed integer	-32768 to 32767
System.Int32	int	32-bit signed integer	-231 to 231-1
System.Int64	long	64-bit signed integer	-263 to 263-1
System.SByte	sbyte	8-bit signed integer	-128 to 127
System.UInt16	ushort	16-bit unsigned integer	0 to 65535
System.UInt32	uint	32-bit unsigned integer	0 to 232-1
System.UInt64	ulong	64-bit unsigned integer	0 to 264-1

• Floating-Point Numbers

Type	Visual C#	Description	Precision	Range
System.Single	float	32-bit floating-point variable	7 significant digits	+/- 1.4 x 10-45 to +/-3.4 x 1038
System.Double	double	64-bit significant digits	15–16	+/- 5.0 x 10-324 to +/-1.7 x 10308
System.Decimal	decimal	128-bit digits	28 significant	+/- 1.0 x 10-28 to +/- 7.9 x 1028

• Non-numeric Type 

Here we have four additional types that do not represent numbers: System.Boolean, System.Char, System.String, and System.Object.

• System.Boolean

The System.Boolean type is used to represent a value that is either true or false. It is called  bool in Visual C#. The values that are valid for Boolean variables are True and False  (Visual C#).

• System.Char

The System.Char type represents a single instance of a 16-bit Unicode character.

 It is called  char in Visual C#.

• System.String

The System.String type is a reference type that represents a series of Char data types. In everyday terms, a string can represent a word, a paragraph, a key value, or any other string of characters. In Visual C#, this type is called string. 

• System.Object

The Object type is the supertype of all types in the .NET Framework. Every type, whether value type or reference type, derives from System.Object. In Visual C#, it is called object.