# bin() function with example in Python

Python bin() function: Here, we are going to learn about the bin() function in Python with example.
Submitted by IncludeHelp, on March 31, 2019

## Python bin() function

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:

```    bin(number)
```

Parameter: number – a valid number whose value can be converted to the binary.

Return value: It returns string containing binary value of given number.

Example:

```    Input:
num1 = 55   # number (+ve)
num2 = -55  # number (-ve)

print(bin(num1))
print(bin(num2))

Output:
0b110111
-0b110111
```

Python code to convert number to binary string

```# 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
```

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