Kas saaksite selgitada, mida tähendab termin 'nullable' programmeerimises?

In programming, the term "nullable" means that a variable or object can accept the value null, which indicates the absence of a value.

In C#, by default, reference types can be null, and for value types (such as int, bool), a special syntax is used for nullable types:

int? nullableInt = null;

This allows the variable nullableInt to hold either an integer value or null.

Nullable types are useful for indicating the absence of a value, for example, when data may be undefined or missing, which is common when working with databases or user input.