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. Because Variant is the only data type in VBScript, it is also the data type returned by all functions in VBScript.
4.1 Variant Subtypes
Beyond the simple numeric or string classifications, a Variant can make further distinctions about the specific nature of numeric information. For example, we 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. We can also have a rich variety of numeric information ranging in size from Boolean values to huge floating-point numbers. These different categories of information that can be contained in a Variant are called subtypes. Most of the time, we can just put the kind of data we want in a Variant, and the Variant behaves in a way that is most appropriate for the data it contains.
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 | |
| 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. |
We can use conversion functions to convert data from one subtype to another. In addition, the VarType function returns information about how your data is stored within a Variant.
