is an item of data used to store the state of objects.
Variable
A Variable has :
are tokens that represent names of variables, methods,
classes, etc.
Identifiers
Categories of Data Types :
are used in mathematical expressions in the same way that they are used in algebra.
Arithmetic Operators
compare two values and determines the relationship between those values.
Relational Operators
have one or two boolean
operands that yield a boolean result.
Logical Operators
is a symbol which represents an operation to be performed.
Operator