A variable in Java is a name given to a memory location that stores data during program execution. Its value can change depending on the logic.

Java supports three main types of variables:

• Local Variables – Declared inside a method or block, accessible only within it.
• Instance Variables – Declared inside a class but outside any method, each object gets its own copy.
• Static Variables – Declared using the static keyword, shared among all objects of the class.

 Local variables do not have default values and must be initialized before use. Instance and static variables have default values based on their data type (e.g., 0 for int, null for objects, false for boolean).

Instance variables belong to objects (each object has its own copy), while static variables belong to the class (shared across all objects).

 Yes. A static final variable is a constant in Java, meaning its value cannot be changed after initialization.