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Beyond the simple string or numeric classifications, Variant can make added distinctions regarding the specific nature of numeric information. For instance, you can have numeric information which represents a date or a time. While used with other date or time data, the result is expressed as a time or date. You can also contain a rich variety of numeric information ranging from Boolean values to enormous floating-point numbers. These distinct categories of information which can be contained in a Variant are called subtypes. Mostly time, you can just put the type of data you desire in a Variant, & the Variant acts in a way that is most suitable for the data it contains.
The following table illustrates the subtypes of data that a Variant can contain.
Subtype
Description
EmptyVariant
Uninitialized. Value is 0 for numeric variables or a zero-length string
("") for string variables.
NullVariant
Intentionally have no valid data.
Boolean
Contains either True or False.
Byte
Contains integer in range 0 to 255.
Integer
Contains integer in range -32,768 to 32,767.
Currency
-922,337,203,685,477.5808 to 922,337,203,685,477.5807.
Long
Have integer in range -2,147,483,648 to 2,147,483,647.
Single
Have a single-precision, floating-point number in the range -
3.402823E38 to -1.401298E-45 for -ve values; 1.401298E-45 to
3.402823E38 for positive values.
Double
Have a double-precision, floating-point number in the range -
1.79769313486232E308 to -4.94065645841247E-324 for -ve values; 4.94065645841247E-324 to 1.79769313486232E308 for positive values.
Date
Have a number that represents a date between January 1, 100 to
December 31, 9999.
Time
Represents a time among 0:00:00 and 23:59:59
String
Have a variable-length string which can be up to approximately 2 billion characters in length.
Object
Have an object.
Error
Have an error number.
You can employ conversion functions to changed data from one subtype to another. Additionally, the VarType function returns information regarding how your data is stored within a Variant.
A constant is a meaningful name which takes the place of a number or string and never alters. VBScript described a number of intrinsic constants. You can get thorough information r
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