How to create a List of size N in C# - Step by Step Examples

How to create a List of size N in C# ?

Answer

To create a list of size N in C#, you can use the List class from the System.Collections.Generic namespace.


✐ Examples

1 Create a List of Size N with Default Values

In this example,

  1. We include the necessary namespace System.Collections.Generic.
  2. We use a for loop to add N default values to the list.
  3. Finally, we print the created list to standard output using a foreach loop.

C# Program

using System;
using System.Collections.Generic;

class Program {
    static void Main() {
        int size = 5;
        int defaultValue = 0;
        List<int> list = new List<int>(size);
        for (int i = 0; i < size; i++) {
            list.Add(defaultValue);
        }
        Console.Write("List of size " + size + " with default values: ");
        foreach (int val in list) {
            Console.Write(val + " ");
        }
        Console.WriteLine();
    }
}

Output

List of size 5 with default values: 0 0 0 0 0

2 Create a List of Size N with Specific Values

In this example,

  1. We include the necessary namespace System.Collections.Generic.
  2. We use a for loop to add N specific values to the list.
  3. Finally, we print the created list to standard output using a foreach loop.

C# Program

using System;
using System.Collections.Generic;

class Program {
    static void Main() {
        int size = 5;
        int specificValue = 1;
        List<int> list = new List<int>(size);
        for (int i = 0; i < size; i++) {
            list.Add(specificValue);
        }
        Console.Write("List of size " + size + " with specific values: ");
        foreach (int val in list) {
            Console.Write(val + " ");
        }
        Console.WriteLine();
    }
}

Output

List of size 5 with specific values: 1 1 1 1 1

Summary

In this tutorial, we learned How to create a List of size N in C# language with well detailed examples.


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