Initialize all elements of an array with a given value in C#

This post will discuss how to initialize all array elements with a specified value in C#.

We know that an array in C# is initialized with a default value on creation. The default value is 0 for integral types. If we need to initialize an array with a different value, we can use any of the following methods:

1. Using `Enumerable.Repeat()` method

We can use the Enumerable.Repeat() method in the System.Linq namespace to generate a sequence of a repeated value and then convert the sequence back to the array using the toArray() method. The following code example shows the usage of this method.

using System;

using System.Linq;

public class Example

{

public static void Main()

{

int element = 1;

int count = 10;

int[] array = Enumerable.Repeat(element, count).ToArray();

Console.WriteLine(String.Join(",", array));

}

Output: 1,1,1,1,1,1,1,1,1,1

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2. Using for loop

The recommended approach is to initialize an array is using a for-loop. The following code example demonstrates how to use a for-loop to fill an array with an initial value.

using System;

public class Example

{

public static void Main()

{

int element = 1;

int count = 10;

int[] array = new int[count];

for (int i = 0; i < count; i++) {

array[i] = element;

}

Console.WriteLine(String.Join(",", array));

}

Output: 1,1,1,1,1,1,1,1,1,1

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3. Using `Array.Fill()` method

The most simple approach is to use the Array.Fill() method, which internally uses a for-loop to fill an array with a single value.

using System;

public class Example

{

public static void Main()

{

int element = 1;

int count = 10;

int[] array = new int[count];

Array.Fill(array, element);

Console.WriteLine(String.Join(",", array));

}

Output: 1,1,1,1,1,1,1,1,1,1

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That’s all about initializing all array elements with a specified value in C#.

Initialize all elements of an array with a given value in C#

1. Using Enumerable.Repeat() method

2. Using for loop

3. Using Array.Fill() method

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1. Using `Enumerable.Repeat()` method

3. Using `Array.Fill()` method