bin
Convert an integer to binary notation.
Python 3.13
bin(x)Parameters
- xint
- An integer.
Return value
A string with the 0b prefix, such as "0b1010"; "-0b101" for a negative number.
Examples
Binary notation of a number
Python 3.13
print(bin(10))0b1010
A negative number and notation without a prefix
Python 3.13
print(bin(-5))
print(format(10, 'b'))-0b101 1010
Details
format(x, "b") and f"{x:b}" give the notation without the 0b prefix. A string is converted back with int("1010", 2) or int("0b1010", 0). Raises TypeError for a float.