Server Side Programming Articles - Page 2546 of 2650

The following is a simple “Hello World” program in C# programming −ExampleLive Demousing System; namespace MyHelloWorldApplication {    class MyDemoClass {       static void Main(string[] args) {          // display text          Console.WriteLine("Hello World");          // display another text          Console.WriteLine("Welcome!");          Console.ReadKey();       }    } }OutputHello World Welcome!Let us see now what all it includes −using System − the using keyword is used to include the System namespace in the program.namespace declaration − A namespace is a collection of classes. The ... Read More

Arrays of arrays in C# are known as Jagged Arrays. To declare jagged arrays, use the double [ ][ ].Let us now declare them −int [][] marks;Now, let us initialize it, wherein marks are arrays of 5 integers −int[][] marks = new int[][]{new int[]{ 90, 95 }, new int[]{ 89, 94 }, new int[]{ 78, 87 }, new int[]{ 76, 68 }, new int[]{ 98, 91 } };ExampleLet us now see the complete example of jagged arrays in C# and learn how to implement it −Live Demousing System; namespace MyApplication {    class MyDemoClass {       static void ... Read More

Access Modifiers specifies the scope of variable and functions in C#. The following are the access modifiers used provided by C#:PublicThe public modifier sets no restriction on the access of members.ProtectedAccess limited to the derived class or class definition.InternalThe Internal access modifier access within the program that has its declaration.Protected internalIt has both the access specifiers provided by protected and internal access modifiers.PrivateLimited only inside the class in which it is declared. The members specified as private cannot be accessed outside the class.ExampleLet us see an example of protected access modifier, accessing the protected members −Live Demousing System; namespace MySpecifiers ... Read More

Asynchronous programming in C# is an efficient approach towards activities blocked or access is delayed. If an activity is blocked like this in a synchronous process, then the complete application waits and it takes more time. The application stops responding. Using the asynchronous approach, the applications continue with other tasks as well.The async and await keywords in C# are used in async programming. Using them, you can work with .NET Framework resources, .NET Core, etc.  Asynchronous methods defined using the async keyword are called async methods.An application with a GUI, check the content of the queue and if an unprocessed ... Read More

An abstract class in C# includes abstract and non-abstract methods. A class is declared abstract to be an abstract class. You cannot instantiate an abstract class.Let us see an example, wherein we have an abstract class Vehicle and abstract method display()−public abstract class Vehicle {    public abstract void display(); } The abstract class has derived classes: Bus, Car, and  Motorcycle. The following is an implementation of the Bus derived class −public class Bus : Vehicle {    public override void display() {       Console.WriteLine("Bus");    } } ExampleLet us see the complete example of abstract classes in C# −Live ... Read More

The Deque class uses a doubly-linked list to implement its collection of elements.  The doubly-linked lists should have two nodes i.e. front and back nodes. This helps in adding elements on the front and back of the Deque.With the Deque class, you have the ability to add and remove elements from both the sides. This is why Deque is said to be a double-ended queue.The Deque class has the following methods in the Queue class −ClearClears the collection of all of its elementsContainsWhether or not an object is in the collectionToArrayUse the ToArray() method to copy all of the elements ... Read More

The “this” keyword in C# is used to refer to the current instance of the class. It is also used to differentiate between the method parameters and class fields if they both have the same name.Another usage of “this” keyword is to call another constructor from a constructor in the same class.Here, for an example, we are showing a record of Students i.e: id, Name, Age, and Subject. To refer to the fields of the current class, we have used the “this” keyword in C# −public Student(int id, String name, int age, String subject) {    this.id = id;   ... Read More

A list is a built-in Python data structure that is used to store an ordered collection of items of different data types. It often occurs that lists contain duplicate values, i.e., the same element repeating multiple times, which causes data inaccuracies. In this article, we will discuss the approaches that can be used to remove the repeated elements from a list. Using set() Using List Comprehension Using a For Loop Using Dictionary fromkeys() Using set() Function The set() function accepts an iterable ... Read More

You can solve this problem by using if-elif-else statements. And to make it like, it will ask for a valid option until the given option is on the list, we can use while loops. When the option is valid, then break the loop, otherwise, it will ask for the input repeatedly.You should take the input as an integer, for that you need to typecast the input to an integer using int() method.ExamplePlease check the code to follow the given points.print("Come-on in. Need help with any bags?") while True: # loop is used to take option until it is not valid. ... Read More

Usin count() function in itertools module gives an iterator of evenly spaced values. The function takes two parameters. start is by default 0 and step is by default 1. Using defaults will generate infinite iterator. Use break to terminate loop.import itertools percentNumbers = [ ] finish = "n" num = "0" for x in itertools.count() :     num = input("enter the mark : ")     num = float(num)     percentNumbers.append(num)     finish = input("stop? (y/n) ")     if finish=='y':break print(percentNumbers)Sample output of the above scriptenter the mark : 11 stop? (y/n) enter the mark : 22 stop? (y/n) enter the mark : 33 stop? (y/n) y [11.0, 22.0, 33.0]