C# Program to Convert Decimal to Binary

Let’ s say you have set the decimal to be −

decVal = 34;
Console.WriteLine("Decimal: {0}", decVal);

Use the ToString() method for the values you get as a binary number for the decimal value −

while (decVal >= 1) {
   val = decVal / 2;
   a += (decVal % 2).ToString();
   decVal = val;
}

Now set a new empty variable to display the binary number using a loop −

string binValue = "";

Example

You can try to run the following code to convert decimal to binary in C#.

Live Demo

using System;
using System.Collections.Generic;
using System.Text;
namespace Demo {
   class MyApplication {
      static void Main(string[] args) {
         int decVal;
         int val;
         string a = "";
         decVal = 34;
         Console.WriteLine("Decimal: {0}", decVal);
         while (decVal >= 1) {
            val = decVal / 2;
            a += (decVal % 2).ToString();
            decVal = val;
         }
         string binValue = "";
         for (int i = a.Length - 1; i >= 0; i--) {
            binValue = binValue + a[i];
         }
         Console.WriteLine("Binary: {0}", binValue);
         Console.Read();
      }
   }
}

Output

Decimal: 34
Binary: 100010