Visual Basic .NET Data Types

Visual Basic .NET (VB .NET) lets you get right to the basics without having to wade through translators. The following table shows you the data types VB .NET uses, as well as their CLR structure, storage size, and value ranges. Use the info for good, not evil!

Visual Basic Type	Common Language Runtime Type Structure	Storage Size	Value Range
Boolean	System.Boolean	2 bytes	True or False
Byte	System.Byte	1 byte	0 to 255 (unsigned)
Char	System.Char	2 bytes	0 to 65535 (unsigned)
Date	System.DateTime	8 bytes	January 1, 0001 to December 31, 9999
Decimal	System.Decimal	16 bytes	+/-79,228,162,514,264,337,593,543,950,335 with no decimal point; +/-7.9228162514264337593543950335 with 28 places to the right of the decimal; smallest non-zero number is +/-0.0000000000000000000000000001
Double (double- precision floating-point)	System.Double	8 bytes	-1.79769313486231E+308 to 4.94065645841247E-324 for negative values; 4.94065645841247E-324 to 1.79769313486231E+308 for positive values
Integer	System.Int32	4 bytes	-2,147,483,648 to 2,147,483,647
Long (long integer)	System.Int64	8 bytes	-9,223,372,036,854,775,808 to 9,223,372,036,854,775,807
Object	System.Object (class)	4 bytes	Any type can be stored in a variable of type Object
Short	System.Int16	2 bytes	-32,768 to 32,767
Single (single-precision floating-point)	System.Single	4 bytes	-3.402823E+38 to -1.401298E-45 for negative values; 1.401298E-45 to 3.402823E+38 for positive values
String (variable-length)	System.String (class)	Depends on implementing platform	0 to approximately 2 billion Unicode characters
User-Defined Type (structure)	(inherits from System.ValueType)	Sum of the sizes of its members	Each member of the structure has a range determined by its data type and independent of the ranges of the other members

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