Python – Convert Integer to Binary String

In this tutorial, we will look at how to convert an integer to a binary string in Python with the help of examples.

How to convert int to binary in Python?

You can use the Python built-in bin() function to convert an integer to a binary string. Pass the integer as an argument. The following is the syntax:

# int i to binary string
bin(i)

It returns the binary representation of the integer in a string format.

Let’s look at an example.

# integer
num = 7
# integer to binary
num_bin = bin(num)
# display binary string and its type
print(num_bin)
print(type(num_bin))

Output:

0b111
<class 'str'>

Here, we convert the number 7 to a binary string. You can see that we get '0b111' as the output. Note that the binary representation 111 has a prefix 0b.

You can use a string slice operation to remove this prefix.

# integer to binary
num_bin = bin(num)[2:]
print(num_bin)

Output:

111

We get the binary string for 7 without the 0b prefix.

Int to binary using format()

Alternatively, you can use the Python format() function. It returns the formatted representation of the passed value. Pass the value and the format specification as arguments to the function. To convert a value to binary, use 'b' as the format specification.

Let’s look at an example.

# integer
num = 7
# integer to binary
num_bin = format(num, 'b')
# display binary string and its type
print(num_bin)
print(type(num_bin))

Output:

111
<class 'str'>

Here we again convert 7 to a binary string. You can see that we get '111' as the output. Notice that unlike the bin() function above, this function does not add any prefix to the binary string.

You might also be interested in –

• Python – Convert Integer to String
• Convert String to Integer in Python
• Python – Convert Integer to Float