$Initialization

$Initialization

is a symbol whose value, if any, is evaluated with ReleaseHold[$Initialization] at the start of a Wolfram Language session.

Details

Examples

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Basic Examples  (1)

Set a value to be evaluated every time the kernel starts:

Set a value that persists only during a front end session:

View the current initialization value:

Properties & Relations  (2)

Initialization values are stored in persistent objects:

List the existing initialization values for $Initialization in all editable persistence locations:

Remove them:

Possible Issues  (1)

Create two initialization values for $Initialization in different locations:

Remove by default removes only the value in the location given by $PersistenceBase:

Remove all values that might exist anywhere in all editable locations given by $PersistencePath:

The default value is still present:

Introduced in 2017
 (11.2)