This is my first program in java which will print or computer say Hello!!
Program request to give a name from user then the program will print Hello!! with user given input
Practice how to get input from user and display the input in output stream
Make a basic calculator
--Use double type data type
--nextDouble() is used for double data type
* Dot operator is used to call specific methods or properties of an object
		 * Create a object in java
		 * Class-Name(e.g Tuna) object-name(tuanObject) = new class-name with parenthesis(e.g. Tuna())
A function is called with one or more values called parameters