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Articles by karthikeya Boyini
Page 60 of 143
How to declare and initialize constant strings in C#?
To set a constant in C#, use the const keyword. Once you have initialized the constant, on changing it will lead to an error.Let’s declare and initialize a constant string −const string one= "Amit";Now you cannot modify the string one because it is set as constant.Let us see an example wherein we have three constant strings. We cannot modify it after declaring −Exampleusing System; class Demo { const string one= "Amit"; static void Main() { // displaying first constant string Console.WriteLine(one); const string two = "Tom"; ...
Read MoreInsert more than one element at once in a C# List
Use the InsertRange() method to insert a list in between the existing lists in C#. Through this, you can easily add more than one element to the existing list.Let us first set a list −List arr1 = new List(); arr1.Add(10); arr1.Add(20); arr1.Add(30); arr1.Add(40); arr1.Add(50);Now, let us set an array. The elements of this array are what we will add to the above list −int[] arr2 = new int[4]; arr2[0] = 60; arr2[1] = 70; arr2[2] = 80; arr2[3] = 90;We will add the above elements to the list −arr1.InsertRange(5, arr2);Here is the complete code −Exampleusing System; using System.Collections.Generic; public class ...
Read MoreBeginning C# programming with Hello World
The following is a simple “Hello World” program in C# programming −Exampleusing 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 MyHelloWorldApplication ...
Read MoreRemove duplicates from a List in C#
Use the Distinct() method to remove duplicates from a list in C#.Firstly, add a new list −List arr1 = new List(); arr1.Add(10); arr1.Add(20); arr1.Add(30); arr1.Add(40); arr1.Add(50); arr1.Add(30); arr1.Add(40); arr1.Add(50);To remove duplicate elements, use the Distinct() method as shown below −List distinct = arr1.Distinct().ToList();Here is the complete code −Exampleusing System; using System.Collections.Generic; using System.Linq; public class Demo { public static void Main() { List arr1 = new List(); arr1.Add(10); arr1.Add(20); arr1.Add(30); arr1.Add(40); arr1.Add(50); arr1.Add(30); arr1.Add(40); ...
Read MoreC# Program to Subtract Two TimeSpan
Firstly, set two TimeSpans −TimeSpan t1 = TimeSpan.FromMinutes(2); TimeSpan t2 = TimeSpan.FromMinutes(1);To add it, use the Subtract() method −imeSpan res = t1.Subtract(t2);Here is the complete code −Exampleusing System; using System.Linq; public class Demo { public static void Main() { TimeSpan t1 = TimeSpan.FromMinutes(2); TimeSpan t2 = TimeSpan.FromMinutes(1); Console.WriteLine("First TimeSpan: "+t1); Console.WriteLine("Second TimeSpan: "+t2); // Subtracting TimeSpan res = t1.Subtract(t2); Console.WriteLine("Resultant TimeSpan: "+res); } }OutputFirst TimeSpan: 00:02:00 Second TimeSpan: 00:01:00 Resultant TimeSpan: 00:01:00
Read MoreC# program to Loop over a two dimensional array
Declare a two dimensional array −string[, ] array = new string[3, 3];Set elements in the array −array[0, 0] = "One"; array[0, 1] = "Two"; array[0, 2] = "Three"; array[1, 0] = "Four"; array[1, 1] = "Five"; array[1, 2] = "Six"; array[2, 0] = "Seven"; array[2, 1] = "Eight"; array[2, 2] = "Nine";Now, get the upper bound to get the dimensions to loop over the array −int uBound0 = array.GetUpperBound(0); int uBound1 = array.GetUpperBound(1);Iterate through a nested loop, until the above two values as shown in the code below −Exampleusing System; using System.Collections.Generic; using System.Linq; public class Demo { public ...
Read MoreAddition and Concatenation in C#
To add and concatenate strings in C#, use the string. Concat method. The plus operator can also be used for the same purpose of concatenation.Plus Operatorstring str2 = "Hanks" + str1;ExampleLet us see an example of + operator to concatenate strings −using System; class Program { static void Main() { string str1 = "Tom"; // concatenation string str2 = "Hanks" + str1; Console.WriteLine(str2); } }OutputHanksTomString.concatstring str2 = string.Concat("Hanks", str1);ExampleLet us see an example of string.concat to concatenate strings in C# −using System; class Program { static void Main() { string str1 = "Tom"; // concatenation string str2 = string.Concat("Hanks", str1); Console.WriteLine(str2); } }OutputHanksTom
Read MoreHow to define a single-dimensional array in C Sharp?
An array is used to store a collection of data, but it is often more useful to think of an array as a collection of variables of the same type stored at contiguous memory locations.To define a single-dimensional array −int[] runs = new int[10];Let us now initialize the array in the same line −int[] runs = new int[5] {125, 173, 190, 264, 188};The following is an example displaying how to declare, initialize and display an array −Exampleusing System; namespace Program { class Demo { static void Main(string[] args) { int[] runs ...
Read MoreHow to use sizeof() operator to find the size of a data type or a variable in C#
The sizeof() datatype returns the size of a data type. Let’s say you need to find the size of int datatype −sizeof(int);For double datatypesizeof(double);Let us see the complete example to find the size of various datatypes −Exampleusing System; namespace Demo { class Program { static void Main(string[] args) { Console.WriteLine("The size of int is {0}", sizeof(int)); Console.WriteLine("The size of int is {0}", sizeof(char)); Console.WriteLine("The size of short is {0}", sizeof(short)); Console.WriteLine("The size of long is {0}", ...
Read MoreWhat is the Capacity property of an ArrayList class in C#?
The capacity property in ArrayList class gets or sets the number of elements that the ArrayList can contain.Capacity is always greater than count. For capacity property −arrList.CapacityThe default capacity is 4. If 5 elements are there, then its capacity is doubled and would be 8. This goes on.You can try to run the following the code to implement Capacity property in C#. This also shows what we discussed above −Exampleusing System; using System.Collections; class Demo { public static void Main() { ArrayList arrList = new ArrayList(); arrList.Add(19); arrList.Add(44); ...
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