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How to convert a number from Decimal to Binary using recursion in C#?
To get the binary of Decimal, using recursion, firstly set the decimal number −
int dec = 30;
Now pass the value to a function −
public int displayBinary(int dec) { }
Now, check the condition until the decimal value is 0 and using recursion get the mod 2 of the decimal num as shown below. The recursive call will call the function again with the dec/2 value −
public int displayBinary(int dec) { int res; if (dec != 0) { res = (dec % 2) + 10 * displayBinary(dec / 2); Console.Write(res); return 0; } else { return 0; } }
The following is the complete code −
Example
using System; public class Program { public static void Main(string[] args) { int dec; Demo d = new Demo(); dec = 30; Console.Write("Decimal = "+dec); Console.Write("
Binary of {0} = ", dec); d.displayBinary (dec); Console.ReadLine(); Console.Write("
"); } } public class Demo { public int displayBinary(int dec){ int res; if (dec != 0) { res = (dec % 2) + 10 * displayBinary(dec / 2); Console.Write(res); return 0; } else { return 0; } } }
Output
Decimal = 30 Binary of 30 = 11110
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