What happens when using the ? operator to access a property or method of an object?

The ?. operator in Android (Kotlin) is the safe call operator. It is used to access a property or method of an object that may be null.

If the object is not null, the property or method is called; otherwise, the expression returns null without throwing a NullPointerException.

Example:

val person: Person? = null
val name = person?.name  // name will be null, not an error

Thus, ?. helps to work safely with nullable types.