Concatenate multiple integers to get a new string in C#

This article illustrates the different techniques to concatenate multiple integers to get a new string in C#.

1. Using Concatenation Operator

A simple solution to concatenate multiple integers together to get a string is using the String.Concat() method. This is the preferred method over the string concatenation operator +, which can join only string instances and requires casting to concatenate integers.

using System;

public class Example

{

public static void Main()

{

int i = 100;

int j = 10;

string s = String.Concat(i, j);

Console.WriteLine(s); // 10010

}

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2. Using `String.Format()` method

Alternatively, you can use the String.Format() method to concatenate multiple integers in C#. To illustrate, consider the following code, which joins two integers.

using System;

public class Example

{

public static void Main()

{

int i = 100;

int j = 10;

string s = string.Format("{0}{1}", i, j);

Console.WriteLine(s); // 10010

}

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3. Using String Interpolation

The String interpolation ($) provides a convenient syntax for concatenating multiple values together to form a string. This is available since C# 6 and can be used as follows to concatenate two integers.

using System;

public class Example

{

public static void Main()

{

int i = 100;

int j = 10;

string s = $"{i}{j}";

Console.WriteLine(s); // 10010

}

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4. Using `StringBuilder`

The StringBuilder class is recommended for concatenating multiple values together in C#, as it outperforms all other methods. It has the Append() method, which is overloaded to accept any data type.

using System;

using System.Text;

public class Example

{

public static void Main()

{

int i = 100;

int j = 10;

string s = new StringBuilder()

.Append(i)

.Append(j)

.ToString();

Console.WriteLine(s); // 10010

}

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That’s all about concatenating multiple integers to get a new string in C#.

Concatenate multiple integers to get a new string in C#

1. Using Concatenation Operator

2. Using String.Format() method

3. Using String Interpolation

4. Using StringBuilder

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2. Using `String.Format()` method

4. Using `StringBuilder`