The document discusses data types in Java programming, including primitive data types like integers and longs, as well as variables which store values of a specific data type and how they are declared and named. It also covers literals, which are fixed values assigned directly to variables without computation, and provides an exercise to declare and assign literal values to variables for age, credit card number, and bank balance.

1. Data Types & VariablesDhrubojyotiKayal

2. What are data types?Data types in JavaVariablesLiteralsAgenda

3. classification identifying one of various types of dataThey have special features and requirementsPerform operations on dataThey need memoryWhat are data types?

4. 8 primitive data types, all signed (+,-)Irrespective of environment the data types have same sizeData types in Java

5. Variables/Fields stores values with specific data typeInstance variables (object fields)Class variables (static fields)Local variables (method fields)Parameters (arguments passed to a method)int age;long creditCardNumber; Terminate with semi-colon or separate with commaint age, long creditCardNumber;Variables

6. Variable names are case-sensitiveUnlimited length with letters and digitsBegin with letter, ‘$’,’_’Don’t use ‘$’ or ‘_’Whitespace not allowedSubsequent characters may be letters, digits, dollar signs, or underscore charactersUse meaningful namesUse Camelian NotationintcreditCardNumber;Variable naming

7. Fixed values assigned to variables without computationint age = 32;long creditCardNumber = 135353553566;Literals

8. Write a simple Java program and declare 3 variables – your age (integer), your credit card number(long), and your bank balance(double)Assign literal values to these fieldsPrint the 3 values in consoleExercise

9. Q&A