Null keyword

Definition

The null keyword is a special value in programming that represents the absence of a value. It is often used to indicate that a variable does not currently have any assigned value.

Related terms

NullPointerException:

This term refers to an error that occurs when you try to access or use a variable that has a null value. It's like trying to open an empty box and expecting there to be something inside.

Scope (public): Scope refers to the visibility and accessibility of variables within different parts of your code. While the null keyword represents no value, scope determines where and how you can access and use that value.

Reference Variable:

A reference variable is a type of variable that holds the memory address of another object. When assigned with null, it means it doesn't point to any valid object in memory.