isnull() Function

Function

isnull( value )

Returns true if value is null, false otherwise.

See also: a!defaultValue, length()

Parameters

Keyword Type Description

value

Any Type

Value to check for null.

Returns

Boolean

Usage considerations

Empty arrays and parameters

  • Empty arrays return false when passed to the isnull() function.
  • The function will not work without a parameter. It is typically used to test whether a Process Variable contains a null value.

Examples

isnull(!userPV) returns true where userPV is a process variable of type User, which is null.

Feature compatibility

The table below lists this function's compatibility with various features in Appian.
Feature Compatibility Note
Portals Compatible
Offline Mobile Compatible
Custom Record Field Expressions Compatible
Process Reports Compatible
Process Events Compatible
Open in Github Built: Mon, Nov 21, 2022 (01:52:20 PM)

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