list programs in C#

Question

List related programs in C#

Amit Mohanty · Answer

" List " is a commonly used collection type that represents a dynamic array, allowing you to store and manipulate a collection of elements. They are versatile and often more convenient than arrays when dealing with collections that can change in size over time. Creating a List : You can create a List in C# by specifying the data type it will hold. For example: List numbers = new List (); This creates an empty list of integers. Adding Elements : You can add elements to a List using the Add method: numbers.Add(10); numbers.Add(20); Accessing Elements : Elements in a List can be accessed by their index, similar to arrays: int firstNumber = numbers[0]; // Accesses the first element (10) Iterating Over a List : You can iterate through the elements of a List using a foreach loop: foreach (int number in numbers) { // Access each element in the list } Finding Elements : You can find the index of an element in the List using the IndexOf method: int index = numbers.IndexOf(20); This will return the index of the first occurrence of the specified element, or -1 if the element is not found. Removing Elements : To remove an element from the List, you can use the Remove method: numbers.Remove(20); This removes the first occurrence of the specified element. Checking for Element Existence : You can check if a particular element exists in the List using the Contains method: bool contains = numbers.Contains(10); This will return true if the element is found in the List. Counting Elements : The Count property gives you the number of elements in the List: int count = numbers.Count; Clearing the List : To remove all elements from the List, you can use the Clear method: numbers.Clear(); This makes the List empty.

Vishal Yelve · Answer

Hi Geethanjali, do refer below article https://www.c-sharpcorner.com/article/c-sharp-list/ https://www.c-sharpcorner.com/UploadFile/219d4d/list-in-C-Sharp/

Naimish Makwana · Answer

If you're looking for examples of how to use lists in C#, you can use the List class from the System.Collections.Generic namespace. Here are some examples of different list operations: Creating a List : using System; using System.Collections.Generic; class Program { static void Main() { // Create a list of integers List numbers = new List (); // Add elements to the list numbers.Add(10); numbers.Add(20); numbers.Add(30); // Access elements in the list Console.WriteLine(numbers[0]); // Output: 10 // Iterate through the list foreach (int number in numbers) { Console.WriteLine(number); } } } Adding and Removing Elements : List colors = new List (); colors.Add("Red"); colors.Add("Green"); colors.Add("Blue"); // Remove an element by value colors.Remove("Green"); // Remove an element by index colors.RemoveAt(0); // Check if an element exists bool containsBlue = colors.Contains("Blue"); // true // Get the number of elements in the list int count = colors.Count; // 1 Sorting a List : List numbers = new List { 5, 3, 1, 4, 2 }; numbers.Sort(); // Sort in ascending order numbers.Reverse(); // Reverse the list Searching in a List : List names = new List { "Alice", "Bob", "Charlie" }; int index = names.IndexOf("Bob"); // Find the index of an element if (index != -1) { Console.WriteLine("Bob found at index " + index); } Clearing and Copying Lists : List sourceList = new List { 1, 2, 3 }; List destinationList = new List (); destinationList.AddRange(sourceList); // Copy elements from source to destination sourceList.Clear(); // Clear all elements from the source list Thanks

Jignesh Kumar · Answer

Hi Geethanjali, Please refer this link which will help you to understand list in C#. https://www.c-sharpcorner.com/article/c-sharp-list/