How is null represented in JSON?

In JSON, null is represented as a keyword without quotes. It is used to signify the absence of a value or an intentional null value in a JSON object. For example:

{
“name”: “John”,
“age”: null
}

In this case, the age key has a null value. JSON’s null is distinct from an empty string “”, zero 0, or false false, which are all considered different values. This makes null useful for representing missing or undefined data when transferring data between systems or APIs.