C# Program to Convert Binary to Decimal with Examples

Introduction:

In this article, we’ll explore how to write a C# Program to Convert Binary to Decimal.

Table of Contents

1 Section 1: Basics of Binary and Decimal Systems
- 1.1 1.1 Binary System
- 1.2 1.2 Decimal System
2 Section 2: C# Program to Convert Binary to Decimal
3 Related

Section 1: Basics of Binary and Decimal Systems

1.1 Binary System

Before diving into C# code, let’s grasp the basics. The binary system uses only two digits, 0 and 1. Each digit is called a bit, and the position of each bit represents a power of 2.

1.2 Decimal System

The decimal system uses base 10 and includes digits from 0 to 9. Each position in a decimal number represents a power of 10.

Section 2: C# Program to Convert Binary to Decimal

Now, let’s translate the theory into C# code.

2.1 Using Convert.ToInt32() Method

Following is the C# Program to Convert Binary to Decimal Using Convert.ToInt32() method.

using System;

class BinaryToDecimalConverter
{
    static void Main()
    {
        string binaryNumber = "101011";
        int decimalNumber = Convert.ToInt32(binaryNumber, 2);

        Console.WriteLine($"Binary: {binaryNumber}\nDecimal: {decimalNumber}");
    }
}

Output:

Binary: 101011
Decimal: 43

Code Explanation:

We use Convert.ToInt32() method to convert the binary string to an integer.
The second parameter, 2, indicates that the input is in base 2 (binary).

2.2 Manual Conversion Using Loops

using System;

class BinaryToDecimalConverter
{
    static void Main()
    {
        string binaryNumber = "101011";
        int decimalNumber = 0;

        for (int i = 0; i < binaryNumber.Length; i++)
        {
            int bit = int.Parse(binaryNumber[i].ToString());
            int power = binaryNumber.Length - 1 - i;
            decimalNumber += bit * (int)Math.Pow(2, power);
        }

        Console.WriteLine($"Binary: {binaryNumber}\nDecimal: {decimalNumber}");
    }
}

Output:

Binary: 101011
Decimal: 43

Code Explanation:

In the above code, the binaryNumber variable holds the binary input as a string.
The decimalNumber variable is initialized to store the result of the conversion.
We are using for loop to iterate through each bit of the binary number from left to right.
Inside the loop, bit is the current binary digit (0 or 1).
The power variable calculates the position value of the current bit.
The decimalNumber is updated by adding the contribution of the current bit using the formula bit ×2 power.
Finally, the original binary number and the resulting decimal number are printed to the console.

2.3 Performs binary-to-decimal conversion

The following C# program takes user input and performs binary-to-decimal conversion.

using System;

class BinaryToDecimalConverter
{
    static void Main()
    {
        // Infinite loop to keep the program running
        while (true)
        {
            // Prompt user for input
            Console.Write("Enter a binary number (or 'exit' to end): ");
            string userInput = Console.ReadLine();

            // Check if the user wants to exit
            if (userInput.ToLower() == "exit")
            {
                break; // Exit the loop if the user enters 'exit'
            }

            // Perform binary to decimal conversion
            try
            {
                int decimalNumber = Convert.ToInt32(userInput, 2);
                Console.WriteLine($"Binary: {userInput}\nDecimal: {decimalNumber}");
            }
            catch (FormatException)
            {
                Console.WriteLine("Invalid binary input. Please enter a valid binary number.");
            }
            catch (OverflowException)
            {
                Console.WriteLine("The entered binary number is too large to be represented as an integer.");
            }

            // Provide some space before the next iteration
            Console.WriteLine();
        }

        // Inform the user that the program is exiting
        Console.WriteLine("Program exiting. Thank you for using the Binary to Decimal Converter!");
    }
}

Output:

Enter a binary number (or 'exit' to end): 111111
Binary: 111111
Decimal: 63
Enter a binary number (or 'exit' to end): 101010
Binary: 101010
Decimal: 42

Enter a binary number (or 'exit' to end): exit
Program exiting. Thank you for using the Binary to Decimal Converter!

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Shekh Ali

Meet Sheikh Ali, a skilled Software engineer and passionate a blogger. He enjoys sharing his expertise in C#, Java, SQL, Design Patterns, and other related topics through his writing. When he's not coding, Sheikh Ali can often indulge in his passions for reading books and fitness training.

Section 1: Basics of Binary and Decimal Systems

1.1 Binary System

1.2 Decimal System

Section 2: C# Program to Convert Binary to Decimal

2.1 Using Convert.ToInt32() Method

2.2 Manual Conversion Using Loops

2.3 Performs binary-to-decimal conversion

Related