What is the Python bin() function?

bin() is an in-built function in Python that takes in integer x and returns the binary representation of x in a string format. If x is not an integer, then the _index()_ method needs to be implemented to obtain an integer as the return value instead of as a “TypeError” exception.

svg viewer

Code

The code below details how to convert the integer to binary using bin():

#  Integer 15 represented in decimal

decimal = 15

#  Integer 15 represented in hexadecimal

hexadecimal = 0xf

#  Integer 15 represented in octal

octal = 0o17

print("Binary representation", bin(decimal))

print("Binary representation", bin(hexadecimal))

print("Binary representation", bin(octal))

Code

The code below details how to convert the user-defined object to binary using bin() and __index()__:

class Total:

  def __init__(self, price, quantity):

    self.price = price

    self.quantity = quantity

  # Implement __index()__ to return an integer

  def __index__(self):

    return self.price * self.quantity

# supply integral values to the constructor only

total_price = Total(1, 4)

print("Binary representation", bin(total_price))

Free Resources

Copyright ©2025 Educative, Inc. All rights reserved