Xojo Documentation Xojo Documentation

Method

Used to determine the data type of a variable.

Syntax

result=VarType(value)

Part	Type	Description
result	Integer	Indicates the data type of value.
value	Variant	Value to be typed.

Notes

Result takes on the following values:

Result	Variant Class Constant	Description
0	TypeNil	Nil
2	TypeInt32	Integer types of 32 bits or less, signed or unsigned. This is equivalent to TypeInteger. To detect 64-bit integers, use TypeInt64.
3	TypeInt64	Int64 or UInt64. This is the replacement for TypeLong.
4	TypeSingle	Single
5	TypeDouble	Double
6	TypeCurrency	Currency
7	TypeDate	Date
8	TypeString	String
9	TypeObject	Object
11	TypeBoolean	Boolean
16	TypeColor	Color
18	TypeCString	CString
19	TypeWString	WString
20	TypePString	PString
21	TypeCFStringRef	CFStringRef
22	TypeWindowPtr	WindowPtr
23	TypeOSType	OSType
26	TypePtr	Ptr
36	TypeStructure	Structure
37	TypeText	Text
4096, logically OR'ed with the element type.	TypeArray	Array

In the case of an array, the result is 4096 logically OR'ed with the array element type. You can get the element type by calling Variant.ArrayElementType. See the example for getting the VarType of an Integer array.

Examples

The following line of code returns 8 (data type of String):

Var dataType As Integer = VarType("Herman")

The following returns 4098 (data type of an array (4096) logically OR'ed with the VarType of the element type of Int32 (2)).

Var a(2) As Int32 = Array(0, 1, 2)
Var dataType As Integer = VarType(a) // 4098

See Also

Variant class, Boolean, CFStringRef, Color, Currency, CString, Delegate, Double, Int8, Int16, Int32, Int64, Integer, OSType, PString, Ptr, Single, String, Structure, UInt8, Uint16, UInt32, UInt64, WindowPtr, WString data types; IsNumeric, Nil functions.