JAVA Theory Part 4

DEFINITIONS(Part-4)

Punctuators: Punctuation signs are used in the program as special characters to terminate or for reference, etc. Ex: (.), (;).

Data Type: Data types are built in java to differentiate between the types of data taken as input from the user. So data types are defined already to differ all the type of data.

Primitive Data Types (or) Composite Data Types: The data types which are independent of any other type are known as Primitive data types. (Basic data types).

Non Primitive Data types (or) Reference Data Types: These are derived data types. They are directly or indirectly independent on Primitive data types.

ASCII: Each character in Java, are given (assigned to) an ASCII code. These codes are taken into consideration during java programming.

Identifiers: Identifiers are the variables in the Java Program. A variable is a named memory location.

Dynamic Initialization: When a method or functions is called and the return value is initialized to a variable is called dynamic initialization.

Static Initialization: This process uses the direct assignment of a variable constant. The variable is initialized during its declaration.

Assignment: Storing constants to variables using token ‘=’. So, ’=’ is called Assignment operator.

Erythematic Expression: It contains variables, constants and arithmetical operators together to produce a meaningful result.

Pure Expression: An arithmetic Expression which contains the same type of data items.

Mixed Expression: An expression which includes different types of variables or values which yield a result.

Expression: A Set of variables or values which yield a result.

Type Conversion: The process of converting one predefined type into another is called Type Conversion.

Type Casting: The explicit conversion of an operand to a specific type is called typecasting. The operator that converts its operand to a specified type is called the typecast operator.

Explicit Conversion: an explicit type conversion is user defined that forces an expression to be of the specific type.

Coercion: An implicit type conversion is a conversion performed by the compiler. The Java compiler converts all operands up to the type of the largest operand. This is also known as type promotion.

Operator: A symbol or a token which performs arithmetical or logical operations and yields a result.

Operand: An operator acts on different data items/entities called operands.

Statement: An expression which is assigned to a variable is completely known as the statement.

Unary Operator: An arithmetical operator which is applied with a single operand is known as the Unary operator.

Binary Operator: An arithmetic operator which deals with two operands, is known as Binary Operator.

Ternary Operator (or) Conditional Assignment Operator: Ternary operator deals with three operands. The value assigned to a variable depends upon a logical expression.

Prefix: When increment or decrement operators are applied before the operant, it is known as prefix operators.

Postfix: When increment or decrement operators are applied after the operant, it is known as prefix operators.