Integer to Binary String in Python

We have an Integer and we need to convert the integer to binary string and print as a result. In this article, we will see how we can convert the integer into binary string using some generally used methods.

Example:

Input : 77
Output : 0b1001101
Explanation: Here, we have integer 77 which we converted into binary string

Using bin()

bin() function is the easiest way to convert an integer into a binary string. It returns the binary with a "0b" prefix to indicate it's a binary number.

n = 77
b = bin(n)
print(type(b),b)

<class 'str'> 0b1001101

Using format()

format() function lets you convert a number to binary without the "0b" prefix. It gives you more control over formatting.

n = 81
b = format(n, 'b')
print(type(b),b)

<class 'str'> 1010001

Using Bitwise operations

This method builds the binary string manually by dividing the number by 2 and collecting remainders. It's slower but helps you understand how binary conversion works.

n = 42
orig = n
b = ''

while n > 0:
    b = str(n % 2) + b
    n //= 2

b = b if b else '0'
print(type(b),b)

<class 'str'> 101010

Explanation: We store the original number in orig, then use a loop to divide it by 2 and prepend each remainder (n % 2) to the string b. This builds the binary representation from right to left. If the number is 0, we set b to "0".

Related articles:

• bin()
• format()

Related Articles

• Convert Binary to Integer
• String format() Method
• Python Bitwise Operators
• Python Data Types