Programming Articles - Page 3165 of 3363

The Main method states what the class does when executed and instantiates other objects and variables.A main method is static since it is available to run when the C# program starts. It is the entry point of the program and runs without even creating an instance of the class.The following shows how to add a Main() method with static −Example Live Demousing System; namespace Demo {    class HelloWorld {       static void Main(string[] args) {          Console.WriteLine("Bingo!");          Console.ReadKey();       }    } }OutputBingo!As you can see in ... Read More

To declare an array in C#, you can use the following syntax −datatype[ ] Name_of_array;Here, datatype is used to specify the type of elements in the array.[ ] specifies the size of the array.Name_of_array specifies the name of the array.The following is an example −double[ ] balance;Let us see an example in which an array is declared and values are added to it −Example Live Demousing System; namespace ArrayApplication {    class MyArray {       static void Main(string[] args) {          int [ ] n = new int[10]; /* n is an array of 10 ... Read More

Comma operator in C# can be used as a separator in method argument list. You can also use it is an operator in a for statement.The following is an example showing using a comma operator in a for statement for initialization −for (int i = begin, j = 1; i

In C++ the scope resolution operator i.e. :: is used for global variables, whereas in C# it is related to namespaces.If you have a type that share an identifier in different namespace, then to identify them use the scope resolution operator.For example, to reference System.Console class, use the global namespace alias with the scope resolution operator −global::System.ConsoleLet us see an example −Example Live Demousing myAlias = System.Collections; namespace Program {    class Demo {       static void Main() {          myAlias::Hashtable h = new myAlias::Hashtable();          h.Add("M", "1");       ... Read More

The RemoveAt() method in C# is used to remove an element in a list at a position you set.Firstly, set elements in the list −var subjects = new List(); subjects.Add("Physics"); subjects.Add("Chemistry"); subjects.Add("Biology"); subjects.Add("Science");To remove an element, set the index from where you want to eliminate the element. The following is to remove an element from the 3rd position −subjects.RemoveAt(2);Let us see the complete code −Example Live Demousing System; using System.Collections.Generic; public class Demo {    public static void Main(string[] args) {       var subjects = new List();       subjects.Add("Physics");       subjects.Add("Chemistry");       ... Read More

To assign reference to a variable, use the ref keyword. A reference parameter is a reference to a memory location of a variable. When you pass parameters by reference, unlike value parameters, a new storage location is not created for these parameters. Declare the reference parameters using the ref keyword.Let us see an example −Here, we are swapping two values using the ref keyword −Example Live Demousing System; namespace Demo {    class Program {       public void swap(ref int x, ref int y) {          int temp;          temp = ... Read More

Set stack with Push operation to add elements to the Stack −Stack st = new Stack(); st.Push('A'); st.Push('M'); st.Push('G'); st.Push('W');To Pop elements from the stack, use Pop() method −st.Pop();st.Pop();The following is an example to implement a stack with Push and Pop operations −Example Live Demousing System; using System.Collections; namespace CollectionsApplication {    class Program {       static void Main(string[] args) {          Stack st = new Stack();          st.Push('A');          st.Push('M');          st.Push('G');          st.Push('W');          Console.WriteLine("Current ... Read More

All arrays consist of contiguous memory locations. The lowest address corresponds to the first element and the highest address to the last element.Firstly, declare an array −int[] rank;But declaring an array does not initialize the array in the memory. When the array variable is initialized, you can assign values to the array.Array is a reference type, so you need to use the new keyword to create an instance of the array. For example, int[] rank = new int[5]; You can assign values to an array at the time of declaration −int[] rank = { 1, 2, 3, 4, 5};With that, ... Read More

Bitwise Left shift operatorThe left operands value is moved left by the number of bits specified by the right operand.Bitwise Right shift operatorThe left operands value is moved right by the number of bits specified by the right operand.The following is an example showing how to work with Bitwise left and right shift operators −Example Live Demousing System; namespace Demo {    class Program {       static void Main(string[] args) {          int a = 60; /* 60 = 0011 1100 */          int b = 13; /* 13 = 0000 1101 */          int c = 0;          c = a > 2; /* 15 = 0000 1111 */          Console.WriteLine("Value of c is {0}", c);          Console.ReadLine();       }    } }OutputValue of c is 240 Value of c is 15

Like any other object-oriented language, C# also has object and classes. Objects are real-world entities and instance of a class. Access the members of the class using an object.To access the class members, you need to use the dot (.) operator after the object name. The dot operator links the name of an object with the name of a member, for example, Box Box1 = new Box();Above you can see Box1 is our object. We will use it to access the members −Box1.height = 7.0;You can also use it to call member functions −Box1.getVolume();The following is an example showing how ... Read More