Question

(1) Define the term identifier as a name for something, such as a variable, constant, or function.

(2) Define the term data type as a set of values together with a set of operations.

(3) Discuss the five arithmetic operators in C++ that are used to manipulate integral and floating-type data types.

Answer 1

1)  Identifier refers as a name given to entities such as constant, variables, functions, structures etc. Reserved words in any programming language cannot be used as identifiers.

ex int sum , summation

No two identifiers in the program have same name as to avoid the collision of what is being called and what is served. Unique name to identify it during the execution of the program. Their can be same name but it all depends on the scope of the identifiers like in the two different functions have same variable name but functions should be different,like wise all the identifiers in their scope should be unique.

2) A data type is an attribute of data which tells the compiler what type of data user is going to store in it. Most programming language support int, float, double, boolean etc. Different types of operations can be performed over the them and store in the resulted data  

ex int y = 4; int x = 8; int z = x+y;

similarly for float ,double and all remaining data types

3) The five of them are for integral type   c = a+b; c = a-b; c = a*b; c = a/b; c = a%b ;

four for the floating type c = a+b; c = a-b; c = a*b; c = a/b;