For the isxxxx() functions in the standard libraries of the C and C++ programming languages, see ctype.h.
Function availability
Function name
VB 6[1][2]
VBA[3]
VBScript[4]
VB .NET
T-SQL
IsArray
Yes
Yes
Yes
Yes
No
IsDate
Yes
Yes
Yes
Yes
Yes
IsDBNull
No
No
No
Yes
No
IsEmpty
Yes
Yes
Yes
No
No
IsError
Yes
Yes
No
Yes
No
IsMissing
Yes
Yes
No
No
No
IsNothing
No
No
No
Yes
No
IsNull
Yes
Yes
Yes
No
Yes
IsNumeric
Yes
Yes
Yes
Yes
Yes
IsObject
Yes
Yes
Yes
No
No
IsReference
No
No
No
Yes
No
The Is functions (also known as data information functions,[5]data inspection functions,[6] or data-testing functions[6]) are a set of functions in Microsoft's Visual Basic 6, Visual Basic for Applications, VBScript, and Visual Basic .NET. Several of them are also provided in Transact-SQL by the .NET Framework Data Provider for Microsoft SQL Server.
The Isfunctions (also known as data information functions, data inspection functions, or data-testing functions) are a set of functions in Microsoft's...
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{\displaystyle \alpha } is an integer or half-integer. Bessel functions for integer α {\displaystyle \alpha } are also known as cylinder functions or the cylindrical...
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representation of the graph of a functionis also known as a plot. In the case of functions of two variables – that is, functions whose domain consists of pairs...
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