# bin() in Python

PythonServer Side ProgrammingProgramming

The bin() function converts a decimal to binary. You can use a positive or negative integer as the parameter to be converted.

## Syntax

Below is the syntax of the function.

bin(n)
Parameters : an integer to convert
Return Value : A binary string of an integer or int object.
Exceptions : Raises TypeError when a float value is sent as argument.

In the below example we convert a positive and a negative integer to binary. The results come out with a prefix of 0b to indicate that the number is a binary representation.

## Example

n = input("Enter an integer :")
dec_number = int(n)
bin_number = bin(dec_number)
print(bin_number)

## Output

Running the above code gives us the following result −

Write the code result here.
Result
Enter an integer :23
0b10111
Enter an integer :-31
-0b11111

If we do not want the 0b prefix in front of the converted number, then we need to apply string function to remove the initial 2 characters.

## Example

n = input("Enter an integer :")
dec_number = int(n)
bin_number = bin(dec_number)
print(type(bin_number))
x = bin_number[2:]
print(x)

## Output

Running the above code gives us the following result −

Enter an integer :13

1101
Published on 07-Aug-2019 11:27:15