Variables that are private to the class.

Question

What are Instance variables?

1. Variables that are accessible only at runtime.
2. Variables that are private to the class.
3. Variables that are accessible by all the methods in the class.
4. Variables that are accessible only by the main method in the class.

Answer 1

3

In more detail they are simply variables declared or defined in a class but outside of any of its methods. Doing so makes these variables available to all methods/blocks in the class. Note that all instances of that class (or in other words, all objects instantiated that are of that class) will have their own copies of instance variables, unless those variables are defined as static