int.bit_count()
int.bit_count() is a Python method in the Number Methods category. Returns the number of ones in the binary representation of the integer. The syntax is int.bit_count(). Returns: Integer. A typical example: (42).bit_count() # 3 (binary: 101010)
(255).bit_count() # 8. A close sibling is int.bit_length(), which returns the number of bits required to represent the integer in binary. A close sibling is int.to_bytes(), which returns an array of bytes representing the integer. A close sibling is int.from_bytes(), which returns the integer represented by the given array of bytes. A close sibling is float.is_integer(), which returns True if the float is finite with integral value. More about this category: Numeric type methods — int, float, complex operations and conversions. Related Number Methods entries: int.bit_length(), int.to_bytes(), int.from_bytes(), float.is_integer(), float.as_integer_ratio(), float.hex(). This page is part of the free Python Reference documentation covering 978+ functions, methods, and modules with examples and parameter details.