C# Program to Convert Integer to String

To convert an integer to string in C#, you can use several methods. The most common approach is the ToString() method, which provides a simple and direct way to convert any integer value to its string representation.

Syntax

Following is the syntax for using ToString() method −

string result = number.ToString();

Alternative syntax using Convert.ToString() method −

string result = Convert.ToString(number);

Using ToString() Method

The ToString() method is called on the integer variable to convert it to a string −

using System;

class Program {
   static void Main(string[] args) {
      int num = 299;
      string s = num.ToString();
      Console.WriteLine("Original integer: " + num);
      Console.WriteLine("Converted string: " + s);
      Console.WriteLine("Type of s: " + s.GetType());
   }
}

The output of the above code is −

Original integer: 299
Converted string: 299
Type of s: System.String

Using Convert.ToString() Method

The Convert.ToString() method is another way to convert integers to strings and can handle null values safely −

using System;

class Program {
   static void Main(string[] args) {
      int num1 = 12345;
      int num2 = -987;
      
      string str1 = Convert.ToString(num1);
      string str2 = Convert.ToString(num2);
      
      Console.WriteLine("Positive number: " + str1);
      Console.WriteLine("Negative number: " + str2);
   }
}

The output of the above code is −

Positive number: 12345
Negative number: -987

Using String Interpolation

You can also convert integers to strings using string interpolation, which is convenient for formatting −

using System;

class Program {
   static void Main(string[] args) {
      int score = 95;
      int total = 100;
      
      string result1 = $"{score}";
      string result2 = $"Score: {score}/{total}";
      
      Console.WriteLine("Simple conversion: " + result1);
      Console.WriteLine("Formatted string: " + result2);
   }
}

The output of the above code is −

Simple conversion: 95
Formatted string: Score: 95/100

Comparison of Methods

Conclusion

Converting integers to strings in C# can be accomplished using ToString(), Convert.ToString(), or string interpolation. The ToString() method is the most commonly used approach for direct conversion, while Convert.ToString() provides better null safety.