Session 4:- Data Type In Java

Basic information About Data type

• When we want store data or information we need appropriate data type for store that information.
• In java there are so many data type to store data or information.
• In java mainly two type of data type.
• NOTE:-  variable name always start with small letter.It's just naming convention its not mandatory.its industry standard.   
1. Primitive Data Type:-

• Syntax  : DataType varibale name = value; 
• Ex:- int i =10;
• int       :  store Non-Decimal type of numeric value
• long    :  store Non-Decimal type of numeric value
• byte    :  store Non-Decimal type of numeric value
• short   :  store Non-Decimal type of numeric value
• double/float :store Non-Decimal  and Decimal type of numeric value
• Ex:- double d =10.20;
• Ex:- float f =20.50f; 

NOTE:- IF you store decimal value in integer data type than it's give compile time error.

                Ex:- int i=10.20; (Type Mismatch)

1. Non-Primitive Data Type:-

•  Indirectly non-primitive data types are behave like as Object.
•  All our own objects are include in the non-primitive data types category .

• String : store Alpha Numeric values
• Ex :- String s="2056/a Jnext Training & Development" ;