Binary to Decimal Converter (code) in Python

Binary to Decimal Converter in Python.

About the project: This program will allow you to enter a binary number (a sequence of 1s and 0s), and it will convert it into its decimal equivalent.

It will run in a continuous loop, so you can perform multiple conversions without restarting the program.

This program will conver a number from Binary to Decimal.

How to use this Binary to Decimal Converter:

Run the Python script.
When you run it, you can enter any binary number.
It will immediately convert it to its decimal form.
The program will continue to run until you type q to quit.

Project Level: Beginner

You can directly copy the below snippet code with the help of green copy button, paste it and run it in any Python editor you have.

Steps: Follow these steps

Step 1: Copy below code using green 'copy' button.

Step 2: Paste the code on your chosen editor.

Step 3: Save the code with filename and .py extention.

Step 4: Run (Press F5 if using python IDLE)



# binary_to_decimal_converter.py

def binary_to_decimal(binary_string):
    """
    Converts a binary string to its decimal integer equivalent.

    Args:
        binary_string (str): A string containing only '0's and '1's.

    Returns:
        int: The decimal equivalent of the binary string.
    """
    decimal_value = 0
    power = 0
    
    # Iterate through the binary string from right to left
    # This is equivalent to `binary_string[::-1]`
    for digit in reversed(binary_string):
        if digit == '1':
            # Add 2 raised to the power of its position
            decimal_value += 2 ** power
        power += 1
        
    return decimal_value

def is_valid_binary(binary_string):
    """
    Checks if a string contains only '0's and '1's.
    """
    return all(char in '01' for char in binary_string)

def main():
    """
    Main function to run the Binary to Decimal Converter in a continuous loop.
    """
    print("--- Python Binary to Decimal Converter ---")
    print("Enter a binary number (e.g., 1010) or 'q' to quit.")

    while True:
        user_input = input("\nEnter a binary number: ").strip()

        # Check if the user wants to quit
        if user_input.lower() == 'q':
            print("Exiting Binary to Decimal Converter. Goodbye!")
            break
        
        # Check for empty input
        if not user_input:
            print("Please enter a binary number.")
            continue

        # Validate the input
        if is_valid_binary(user_input):
            decimal_result = binary_to_decimal(user_input)
            print(f"The decimal equivalent of {user_input} is {decimal_result}.")
        else:
            print("Invalid input. Please enter a number containing only 1s and 0s.")

# This ensures that main() is called only when the script is executed directly.
if __name__ == "__main__":
    main()