The Null Data Type The Null Data Type

The Null Data Type

Zack Cohen Zack Cohen
The Null Airkit type has only one value NULL, it is used to represent the absence of a value. There is nothing that can be done with NULL except to check if a value is NULL. The IF statement considers NULL to be false, so one can very quickly test to determine if a variable is NULL or not. For example suppose one would like to display a personalized message to a user, the following Airscript expression will display "Hello {{name}}" to the user if the name variable is not NULL, and it will display "Hello!" if the name variable is NULL (meaning the name is unknown).
IF(name, "Hello {{name}}", "Hello!")