# Python bin() Function: Use, Syntax, and Examples

Python bin() function: In this tutorial, we will learn about the bin() function in Python with its use, syntax, parameters, returns type, and examples. By IncludeHelp Last updated : June 23, 2023

## Python bin() function

The bin() function is a library function in Python, it is used to get the binary value of a number, it accepts a number and returns an equivalent binary string.

## Syntax

The following is the syntax of bin() function:

```bin(number)
```

## Parameter(s):

The following are the parameter(s):

• number – A valid number whose value can be converted to the binary.

## Return Value

The return type of bin() function is <class 'str'>, it returns string containing binary value of given number.

## Python bin() Function: Example 1

```# python code to convert number to binary
# an example of bin() function in Python

num1 = 55   # number (+ve)
num2 = -55  # number (-ve)

# converting to binary
bin_str = bin(num1)
print("Binary value of ", num1, " is = ", bin_str)

bin_str = bin(num2)
print("Binary value of ", num2, " is = ", bin_str)
```

### Output

```Binary value of  55  is =  0b110111
Binary value of  -55  is =  -0b110111
```

## Python bin() Function: Example 2

If the input value is not a valid integer, the method returns a TypeError.

```# bin() with non-integer value

x = 10.2

print(bin(x))
```

### Output

```Traceback (most recent call last):
File "main.py", line 5, in <module>
print(bin(x))
TypeError: 'float' object cannot be interpreted as an integer
```