What is variable in java | Static | Non Static |local Variable in java

 What is variable?

Variable is a name given to a memory location for storing value.

Variable are having two parts

              1. Declaration

              2. Initialisation

1.Declaration

 Creating a variable is called declaration.

Syntax:

        Datatype Variable name;

    Example: 

                     byte a;

                    int a;

Initialisation:

  Providing valuable to a variable is called initialisation.

Example: 

                    b = 5;

                    c= 9;

First we have to declare a variable after that we can initialise

In java there are three types of variable

    a.   Static Variable

    b.   Non static variable

    c.    Local variable

a.  Static Variable

It is a variable where value doesn't varies from object to object.

It share single copy with every object.

It declared inside of a class outside of a method with static keyword.

Example:

     class F

{

      static int x = 10;

public static void main(String args[])

{

}

}

The value of a static variable get stored in class area.

It is not mandatory to initialise a static variable.

If we are not providing any value to our static variable, JVM will provide default value to them.

We are create 'n' number of static variable in class.

Accessing of Static variable

We can access a static variable by three ways

1 . Directly     2. By Class name       3. By object reference