Variables variables are used to store data. They act as lebel and store items of different types. We only store only the types ment for a variable Primitive data types Primitive data type in JAVA are predefined. Table below shows various primitive data types along with the size and the range of numbers that can be accomodated in each type. Data Type Size Range of numbers byte 1 byte Integers (-128 to + 127 short 2 byte Integers(-32768 to 32767) int 4 byte Integers(-2,147,483,648 to +2,147,483,647) long 4 byte Integers(-9,223,372,036,854,775,808 to +9,223,372,036,854,775,807) float 4 byte Floating point numbers(+- 3.4E-38 to +/-3.4E38, 7 digit of accuracy) double 8 bytes Floating point numbers(+/-1.7E-308 to +/-1.7E308, 15 digit accuracy) Example To find the average, that is sum of two divide by ‘2’ which will be (20+5)/2= 12.5 which will be floating point, so need to declare average as

Step-1 Launch Intellij double click the following IntelliJ icon to launch the IntelliJ         Step-2: Click New Project   Step-3: Select JAVA and click Next Step-4: Click Next Step-5: Name the Project and click finish The following screen will appear     Step-6 Right Click src folder in project space Clcick New --> package and name the package packages is a namespace that will be required to contain everything in JAVA. Give name to package and click OK. We can arrange all our JAVA files in packages. packages is a namespace that organizes all related classes and interfaces. So basically we can think of packages as one that simulates folders in your systems for example html files in one folder, images in another folder, applications in yet another and so on. For now