![]() So If you try to assign a null value to a regular variable, the compiler will throw an error. By supporting nullability in the type system, the compiler can detect possible NullPointerException errors at compile time and reduce the possibility of having them thrown at runtime.Īll variables in Kotlin are non-nullable by default. It means you have the ability to declare whether a variable can hold a null value or not. Kotlin supports nullability as part of its type System. ![]() Kotlin has two types of references that are interpreted by the compiler that gives information to the programmer about the correctness of a program at compile time. Kotlin could never throw a NullPointerException unless you ask for it. Kotlin can detect NPE exception errors at compile time itself and guard against them. Null Safety in Kotlin is eliminating the risk of occurrence of NPE in real time. It is not a good thing if your app crashes and face NPE exception errors. NPE is runtime exceptions which are thrown by the program at runtime causing application failure and system crashes.
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