C#: Convert a decimal number to binary

Last update on December 20 2024 12:52:20 (UTC/GMT +8 hours)

Write a program in C# Sharp to convert a decimal number to binary using recursion.

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Sample Solution:

C# Sharp Code:

using System;

// Class RecExercise13 to convert a decimal number to binary
class RecExercise13
{
    // Main method to execute the program
    public static void Main(string[] args)
    {
        int num;
        DecToBinClass pg = new DecToBinClass();
        Console.WriteLine("\n\n Recursion : Convert a decimal number to binary :");
        Console.WriteLine("------------------------------------------------------");
        Console.Write(" Input a decimal number : ");
        num = int.Parse(Console.ReadLine());
        Console.Write(" The binary equivalent of {0} is : ", num);
        pg.deciToBinary(num);
        Console.ReadLine();
        Console.Write("\n");
    }
}

// Class DecToBinClass to perform the decimal to binary conversion
public class DecToBinClass
{
    // Method to convert a decimal number to binary recursively
    public int deciToBinary(int num)
    {
        int bin;
        if (num != 0)
        {
            // Calculate binary equivalent using recursion
            bin = (num % 2) + 10 * deciToBinary(num / 2);
            Console.Write(bin); // Output the binary digit
            return 0;
        }
        else
        {
            return 0;
        }
    }
}

Sample Output:

 Recursion : Convert a decimal number to binary :                                                             
------------------------------------------------------                                                        
 Input a decimal number : 65                                                                                  
 The binary equivalent of 65 is : 1000001

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