Question

Define Keywords, Constants, Variable and Data typed

Answer 1

Keywords: keywords contain many keys in which alphabet key number keys catalogue keys shift key enter key window key spacebar key delete key functions and so on key.
constant: constant is also used in mathematics and physics to prove the formulas it is very helpful in 2 subjects called physics and mathematics and it is also helpful in chemistry. this is alphabet a type of alphabet which is used in Mathematics Physics and Chemistry.
variables: variables are those alphabets which change itself like "a" change to "b " eaten to "c" is known as variable.

Answer 2

$\textbf{ANSWER:}$

$<b><u>Keywords: Keywords are the reserved words of java with some special meanings in the context of a Java program.$

Constants: Constants mean the values that do not change during program's excution.

Variable: A variable is a named location in the memory which stores values temporarily. A variable has a unique name, a type and a size which is used to identify it in a program.

Data types: Data types are defined as the data storage format that a variable can store to perform specific operation.