C#: Convert a binary to a decimal using for loop and without using an array

Last update on December 20 2024 12:50:20 (UTC/GMT +8 hours)

Write a program in C# Sharp to convert a binary number into a decimal number without using an array, function and while loop.

Sample Solution:-

C# Sharp Code:

using System;  // Importing necessary namespace

public class Exercise42  // Declaration of the Exercise42 class
{  
    public static void Main()  // Main method, entry point of the program
    {       
        int n1, n, p = 1;  // Declaration of variables
        int dec = 0, i = 1, j, d;  // Initialization of variables for decimal conversion

        Console.Write("\n\n");  // Displaying new lines
        Console.Write("Convert a binary to decimal using for loop and without using array:\n");  // Displaying the purpose of the program
        Console.Write("---------------------------------------------------------------------\n\n");  // Displaying a separator and new lines

        Console.Write("Input a binary number :");  // Prompting user to input a binary number
        n = Convert.ToInt32(Console.ReadLine());  // Reading user input

        n1 = n;  // Storing the original binary number for display

        for (j = n; j > 0; j = j / 10)  // Loop to convert binary to decimal
        {  
            d = j % 10;  // Extracting each digit from the binary number

            if (i == 1)
                p *= 1;  // Power value for the first digit is 1
            else
                p *= 2;  // Power value for subsequent digits is doubled

            dec = dec + (d * p);  // Calculating decimal equivalent by multiplying digit by corresponding power of 2
            i++;  // Incrementing the power index for each digit position
        }

        Console.Write("\nThe Binary Number : {0}\nThe equivalent Decimal  Number : {1} \n\n", n1, dec);  // Displaying the converted decimal number
    }
}

Sample Output:

Convert a binary to decimal using for loop and without using array:                                         
---------------------------------------------------------------------                                       
Input a binary number :1000001                                                                              
The Binary Number : 1000001                                                                                 
The equivalent Decimal  Number : 65

Flowchart:

C# Sharp Code Editor:

Click to Open Editor

Contribute your code and comments through Disqus.

Previous: Write a program in C# Sharp to convert a decimal number into binary without using an array.
Next: Write a C# Sharp program to find HCF (Highest Common Factor) of two numbers.