Bits in Enum flags

Question

Hi

Just need assistance in clarifying the below please

I'm aware a bit has a single binary value of either 0 or 1 and 8 bits make a Byte etc etc. but how does this work in relation to Bits in an Enum flag.

For example:-

The values 0x0, 0x1, 0x2, 0x4 indicate powers of two. In computer bits, powers of two contain one bit set.

Quote "Where powers of two contain one bit set" does this mean it could be either a 0 or 1 in binary?

i.e. 0x0 is 0, 0x1 is 01, 0x2 is 11 and 0x4 is 1111?

Thanks

Vulpes · Answer

0x0 is not in fact a power of two. The first power of two is 0x1 which is 2 to the power 0. If you think about it for a binary number to be a power of two it needs to have exactly one bit set. For example: 0x1 is 00000001 0x2 is 00000010 0x4 is 00000100 0x8 is 00001000 and so on.

S · Answer

Understood fully thanks kindly Vulpes!