Written version of Logical operators in C++

Written version of Logical operators in C++

Last Updated : 07 Feb, 2018

Can we use keywords in place of operators in C++ ? Yes, certainly, we can. The ANSI C++ Standard has proposed keywords for several C++ operators . They originated in C in the header at the time when there were keyboards that couldn't type the required symbols like &&, !, || etc. In C++, they became alternate token just like regular tokens, except for spelling. So during parsing "and" is exactly the same as "&&", it's just a different way of spelling the same thing. Consider the following expression:

x > y && m != 100,

can be replaced by:

x > y and m not_eq 100

CPP

// C++ program to demonstrate 
// logical operator keywords
#include<iostream>
using namespace std;
int main()
{
    int x, y, z;
    x = 1;
    y = 0;
    z = 10;

    // Using keywords for || (or), && (and)
    if ((x or y) and y )
    {
        cout << "Hi, we are in if.";
    } 

    // Using keywords for ! (not), || (or), != (not_eq)
    else if (not y or x not_eq z)
    {
        cout << "Hi, we are in else if.";
    }
    return 0;
}

Output:

Hi, we are in else if.

Similar to this, we can use keywords in place of all the operators mentioned in the table . Benefits-

Operator keyword enhances the readability of logical expressions.
They are useful in situations when the keyboard doesnot support certain special characters such as &, ~ and ^, so we can use keywords in place of them.

Pitfall: Although, it is a very exciting feature of C++, but one needs to be a bit cautious while using it . Ordinarily, while, using these operators, we can write variables with or without leaving a space before or after these operators, but, when these operators are replaced by keywords, it becomes mandatory to leave a space after and before these keywords, as demonstrated below :

CPP

// C++ program to demonstrate 
// logical operator keywords
#include<iostream>
using namespace std;
int main()
{
    int x, y;
    x = 1;
    
    // Wrong way to use compl for ~
    // y = complx;

    // Right way to use compl for ~
    y = compl x;

    cout << y;
    return 0;
}

Output:

-2

Reference-

Object-Oriented Programming with C++ by E. Balagurusamy

Written version of Logical operators in C++

M

Mrigendra Singh

Improve

Article Tags :

Practice Tags :

CPP

Similar Reads

C++ Programming Language

C++ is a computer programming language developed by Bjarne Stroustrup as an extension of the C language. It is known for is fast speed, low level memory management and is often taught as first programming language. It provides:Hands-on application of different programming concepts.Similar syntax to

Types of Network Topology

Network topology refers to the arrangement of different elements like nodes, links, or devices in a computer network. Common types of network topology include bus, star, ring, mesh, and tree topologies, each with its advantages and disadvantages. In this article, we will discuss different types of n

Java Exception Handling

Exception handling in Java allows developers to manage runtime errors effectively by using mechanisms like try-catch block, finally block, throwing Exceptions, Custom Exception handling, etc. An Exception is an unwanted or unexpected event that occurs during the execution of a program, i.e., at runt

Object Oriented Programming in C++

Object Oriented Programming - As the name suggests uses objects in programming. Object-oriented programming aims to implement real-world entities like inheritance, hiding, polymorphism, etc. in programming. The main aim of OOP is to bind together the data and the functions that operate on them so th

Types of Operating Systems

Operating Systems can be categorized according to different criteria like whether an operating system is for mobile devices (examples Android and iOS) or desktop (examples Windows and Linux). Here, we are going to classify based on functionalities an operating system provides.8 Main Operating System

An Interface in Java programming language is defined as an abstract type used to specify the behaviour of a class. An interface in Java is a blueprint of a behaviour. A Java interface contains static constants and abstract methods. Key Properties of Interface:The interface in Java is a mechanism to

Inheritance in C++

The capability of a class to derive properties and characteristics from another class is called Inheritance. Inheritance is one of the most important features of Object-Oriented Programming in C++. In this article, we will learn about inheritance in C++, its modes and types along with the informatio

30 OOPs Interview Questions and Answers [2025 Updated]

Object-oriented programming, or OOPs, is a programming paradigm that implements the concept of objects in the program. It aims to provide an easier solution to real-world problems by implementing real-world entities such as inheritance, abstraction, polymorphism, etc. in programming. OOPs concept is

Vector in C++ STL

C++ vector is a dynamic array that stores collection of elements same type in contiguous memory. It has the ability to resize itself automatically when an element is inserted or deleted.Create a VectorBefore creating a vector, we must know that a vector is defined as the std::vector class template i

Python Variables

In Python, variables are used to store data that can be referenced and manipulated during program execution. A variable is essentially a name that is assigned to a value. Unlike many other programming languages, Python variables do not require explicit declaration of type. The type of the variable i