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Internal Access SpecifierInternal access specifier allows a class to expose its member variables and member functions to other functions and objects in the current assembly.Any member with internal access specifier can be accessed from any class or method defined within the application in which the member is defined.The following is an example −Exampleusing System; namespace RectangleApplication { class Rectangle { //member variables internal double length; internal double width; double GetArea() { return length * width; } ... Read More
Generate OTP is now a requirement on most of the website now-a-days. In case of additional authentication, system generates a OTP password adhering to OTP policy of the company. Following example generates a unique OTP adhering to following conditions −It should contain at least one number.Length should be 4 characters.Exampleimport java.util.Random; public class Tester { public static void main(String[] args) { System.out.println(generateOTP(4)); } private static char[] generateOTP(int length) { String numbers = "1234567890"; Random random = new Random(); char[] otp = new ... Read More
To add integer values to a list in C#, use the Add() method.Firstly, declare an integer list in C# −List list1 = new List();Now add integer values −list1.Add(900); list1.Add(400); list1.Add(300);Let us see the complete code −Exampleusing System; using System.Collections.Generic; using System.Linq; using System.Text.RegularExpressions; namespace Demo { public class Program { public static void Main(String[] args) { List list1 = new List(); list1.Add(900); list1.Add(400); list1.Add(300); Console.WriteLine(list1.Count); } } }
Firstly, declare a list −var teams = new List();To add items to a C# list, use the Add() method −teams.Add("US"); teams.Add("Canada"); teams.Add("India"); teams.Add("Australia");You can try to run the following code to add items to a list in C# −Exampleusing System; using System.Collections.Generic; public class Demo { public static void Main(string[] args) { var teams = new List(); teams.Add("US"); teams.Add("Canada"); teams.Add("India"); teams.Add("Australia"); Console.WriteLine("Elements..."); foreach (var countries in teams) { Console.WriteLine(countries); } } }
A method catches an exception using a combination of the try and catch keywords. A try/catch block is placed around the code that might generate an exception. Code within a try/catch block is referred to as protected code, and the syntax for using try/catch looks like the following −Syntaxtry { // Protected code } catch (ExceptionName e1) { // Catch block }The code which is prone to exceptions is placed in the try block. When an exception occurs, that exception occurred is handled by catch block associated with it. Every try block should be immediately followed either by ... Read More
To add an element to existing jagged array, just set the value of the element with a new value.Let’s say you need to add an element at the following location −a[3][1]Just set the value −a[3][1] = 500;Above, we accessed the first element of the 3rd array in a jagged array.Let us see the complete code −Exampleusing System; namespace Demo { class Program { static void Main(string[] args) { int[][] x = new int[][]{new int[]{10, 20}, new int[]{30, 40}, new int[]{50, 60}, new int[]{ 70, 80 }, new int[]{ 90, 100 ... Read More
A field marked "read-only", can only be set once during the construction of an object. It cannot be changed −Let us see an example.class Employee { readonly int salary; Employee(int salary) { this.salary = salary; } void UpdateSalary() { //salary = 50000; // Compile error } }Above, we have set the salary field as read-only.If you will change it, then a compile-time error will occur. The same is shown in the above example.Let us now see how to check whether an array is read-only or not −Exampleusing ... Read More
Set the string array for the values −string[] names = new string[] {"Jack", "Tom"};Now using foreach array, write the content in the file −using (StreamWriter sw = new StreamWriter("names.txt")) { foreach (string s in names) { sw.WriteLine(s); } }The following is an example showing an array of streams to write text to a file −Exampleusing System; using System.IO; namespace FileApplication { class Program { static void Main(string[] args) { string[] names = new string[] {"Jack", "Tom"}; using (StreamWriter sw = ... Read More
Local VariableLocal variables are declared in methods, constructors, or blocks.Local variables are created when the method, constructor or block is entered and the variable will be destroyed once it exits the method, constructor, or block.Access modifiers cannot be used for local variables.Local variables are visible only within the declared method, constructor, or block.Local variables are implemented at stack level internally.There is no default value for local variables, so local variables should be declared and an initial value should be assigned before the first use.final Local Variablefinal is the only allowed access modifier for local variables.final local variable is not required ... Read More
Final Static VariablesClass variables also known as static variables are declared with the static keyword in a class, but outside a method, constructor or a block.There would only be one copy of each class variable per class, regardless of how many objects are created from it.Static variables are normally declared as constants using the final keyword. Constants are variables that are declared as public/private, final, and static. Constant variables never change from their initial value.Static variables are stored in the static memory, mostly declared as final and used as either public or private constants.Static variables are created when the program ... Read More