VBSCRIPT DATA TYPES

VBScript has only one data type called a Variant.

• A Variant is a special kind of data type that can contain different kinds of information, depending on how it is used
  

• A Variant can contain either numeric or string information. 
  

• Because Variant is the only data type in VBScript, it is also the data type returned by all functions in VBScript.

VARIANT SUBTPES

• Beyond the simple numeric or string classifications, 

  a Variant can make further distinctions about the specific nature of numeric information.
  

•  For example, you can have numeric information that represents a date or a time. 

  When used with other date or time data, the result is always expressed as a date or a time.
  

• different categories of information that can be contained in a Variant are called subtypes.
  

• You can use conversion functions to convert data from one subtype to another. 
  
  

The following table shows subtypes of data that a Variant can contain.

Subtype	Description
Empty	Variant is uninitialized. Value is 0 for numeric variables or a zero-length string ("") for string variables.
Null	Variant intentionally contains no valid data.
Boolean	Contains either True or False.
Byte	Contains integer in the range 0 to 255.
Integer	Contains integer in the range -32,768 to 32,767.
Currency	-922,337,203,685,477.5808 to 922,337,203,685,477.5807.
Long	Contains integer in the range -2,147,483,648 to 2,147,483,647.
Single	Contains a single-precision, floating-point number in the range -3.402823E38 to -1.401298E-45 for negative values; 1.401298E-45 to 3.402823E38 for positive values.
Double	Contains a double-precision, floating-point number in the range -1.79769313486232E308 to -4.94065645841247E-324 for negative values; 4.94065645841247E-324 to 1.79769313486232E308 for positive values.
Date (Time)	Contains a number that represents a date between January 1, 100 to December 31, 9999.
String	Contains a variable-length string that can be up to approximately 2 billion characters in length.
Object	Contains an object.
Error	Contains an error number.