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| Documentation |
| IsBoolean | Returns if the datatype of an expression is Boolean. |
| IsByte | Returns if the datatype of an expression is Byte. |
| IsDate | Returns if the datatype of an expression is Date. |
| IsFloat | Returns if the datatype of an expression is Float. |
| IsInteger | Returns if the datatype of an expression is Integer. |
| IsLong | Returns if the datatype of an expression is Long. |
| IsNull | Returns if an expression is NULL. |
| IsNumber | Returns if an expression is a number. |
| IsObject | Returns if an expression is an Object. |
| IsShort | Returns if the datatype of an expression is Short. |
| IsSingle | Returns if the datatype of an expression is Single. |
| IsString | Returns if the datatype of an expression is String. |
| TypeOf | Returns the datatype of an expression. |