A1

Variables:

• Variable is the named location to storing a value.
• It is the name of the memory location

int a=10;  // a is a variable

• In java there are three types of variables

                1.Local Variable

                2.Instance Variable

                3.Static Variable

1) Local Variable:

• Variable declared inside the body of the method is called Local Variable.
• we can use this variable only within that method only.
• Local variable cannot be defined with "static" keyword.

public class example

{

    static int a=10;

    void method()

    {

        int b=20;//local variable

    }

    public static void main(String args[])

    {

        int c=30;

    }

}

2) Instance Variable:

• A variable declared inside the class but not inside the body of the method, is called Instance Variable.

public class example

{

    static int a=10;

    void method()

    {

        int b=20;

    }

    public static void main(String args[])

    {

        int c=30;//instance variable

    }

}

3) Static Variable:

• A variable is declared with static keyword is called static variable

public class example

{

    static int a=10;//static variable

    void method()

    {

        int b=20;

    }

    public static void main(String args[])

    {

        int c=30;

    }

}