Local Variables...

The variables present in the method known as the Local Variables
they don't have any default value.They must be initialised.
Basic 3 steps for local variable:-

1. Declaration
2. Initialisation
3. Usage

like this

output :- 10

output: 5

                                                                                       5

in the above example , multi declaration of the variable give compile time error you cannot declare variable more than once.

in the above example, you can modify the value of variable ..output:-8

in the above example, you cannot do this compile time error x must be initialised before usage.

wrong order first usage then initialisation gives compile time error....

this is all about local variable.....