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false() Function

Function

false( returns )

Returns the Boolean value false.

See also:

  • if(): Evaluates a logical statement and returns different results if the logical statement returns true or false.
  • true(): The opposite to the false() function; returns the boolean value true.

Parameters

Keyword Type Description

returns

Boolean

Returns the boolean value false.

Returns

Boolean

Usage considerations

Using the false() function is equivalent to using false (without calling the function) in any expression. If calling the false() function with parentheses, any parameters provided to the function are ignored.

An easy way to check if a value is either null or true is to make a comparison to false using the <> operator. For example, the following expressions result in the same outcome:

  • local!value <> false()
  • or(local!value = true(), a!isNullOrEmpty(local!value))

Examples

Basic example

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false()

Returns false.

Using false() as a user property

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a!localVariables(
  local!user1Active: false(),
  local!user2Active: false(),
  local!user3Active: true(),
  and(
    local!user1Active,
    local!user2Active,
    local!user3Active
  )
)

Returns false because not all of the users are currently active.

Using false() for field configurations

Paste the following example into an interface to test the expression.

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a!boxLayout(
  label: "Box",
  contents: {
    a!textField(
      value: "Test",
      readOnly: true()
    )
  },
  isCollapsible: false(),
  showBorder: false(),
  showShadow: false()
)

Feature compatibility

The table below lists this function's compatibility with various features in Appian.
Feature Compatibility Note
Portals Compatible
Offline Mobile Compatible
Sync-Time Custom Record Fields Compatible

Can be used to create a custom record field that only evaluates at sync time.

Real-Time Custom Record Fields Incompatible

Custom record fields that evaluate in real time must be configured using one or more Custom Field functions.

Process Reports Compatible
Process Events Compatible
Open in Github Built: Fri, Apr 12, 2024 (09:33:39 PM)

false() Function

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