Identifiers and Operators in C++

Shailendra Chauhan

Print 4 min read

15 Feb 2023

Beginner

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Introduction

If you've ever wondered what on Earth identifiers and operators are when it comes to C++ programming, have no fear! The identifier is a symbolic name that is mainly used in programming for naming the variables, functions, and labels in the program. It is basically a string of alphabetical and numerical characters that helps programmers to understand the elements of a particular program. Operators are characters in programming that expressly represent any logical or mathematical process happening in that program.

What are Identifiers in C++

If the question is what are identifiers in c++ language then the answer should be those identifiers in C++ are used to refer to the names of the variables, functions, data types, and arrays that are created by the programmers. Any basic programs require identifiers to differentiate their various roles.

Example

#include <iostream> 
using namespace std; 
int main() 
{ 
    int a; 
    int A; 

    cout<<"Enter the values of 'a' and 'A'"; 

    cin>>a; 
    cin>>A; 

    cout<<"\nThe values that you have entered are : "<<a<<" , "<<A; 
    return 0; 
}

Output

Enter the value of 'a' and 'A'
5
6
The value that you have entered are: 5, 6

Types of identifiers

There are some types of identifiers in C++ language those are,

Constants
Variables
Functions
Labels
Defined data type

Difference between keyword and identifier

The difference between keywords and identifiers will be discussed here

Identifiers	Keywords
Identifiers are mainly a particular kind of name that identifies elements of that program by the programmers.	Keywords are mainly a particular type of word whose meaning is stored by compilers.
It contains digits, letters, and underscore.	It contains letters only.
The name of the variable can be identified by identifiers	The types of entities in the program are specified by Keywords
The initial letter of the identifiers can be uppercase, lowercase, or underscore	The initial letter of the keyword is started in lowercase
The only special character is used in identifiers are underscore	In keywords, there are no special characters
There are two types of identifiers, those are internal and external identifiers	There are no classifications in keywords
Examples of identifiers are, results, sum, test, power, and many more	Examples of keywords are, if, for, break, else, and many more

What are operators in C++

What are operators in C++ can be defined as a simple symbol that performs many operations in the C++ programming language

Types of operators in C++

There are some types of operators in the C++ programming language, those are

Arithmetic Operators
Relational Operators
Logical Operators
Bitwise Operators
Assignment Operator
Unary operator
Ternary or Conditional Operator
Misc Operator

Precedence of operators in C++

C++ operator precedence is a specific method that decides which operators will be evaluated first and which one will be evaluated last. This associativity specifies the direction of the evaluation which can go from left to right or right to left.

Evaluation of C++ operator precedence:

Summary

This article contains what are identifiers in C++ including the types of identifiers and what are operators and the precedence of operators in C++. C++ is a powerful, complied, object-oriented programming language that many computer scientists learn in college. In this blog post, we covered two topics that are important to understand when coding in C++: identifiers and operators. Identifiers are the names given to variables, functions, and other elements in code and they follow certain rules. Operators are symbols that tell the compiler to perform specific operations and they also have precedence levels which dictate the order in which they are executed.