c8_natural_size_bits

c8::natural::size_bits

auto size_bits() const noexcept -> std::size_t;

It is often useful to determine the minimum number of bits required to represent a natural, without any rounding to the nearest multiple of a digit. This function computes and returns that number.

For example, the natural number 1 requires 1 bit, the number 7 requires 3 bits, the number 0x178927fbea79ac2 requires 57 bits, and the number 0xedcba9876543210fedcba9876543210fedcba9876543210fedcba9876543210fedcba9876543210 requires 316.

Return Value

The number of bits required to represent this natural number.

Exceptions

None.

See Also

• class natural
• c8 library