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A bitfield is an integer value treated as a sequence of bits (binary digits) which can be toggled individually as flags. In conventional decimal math, each flag is represented a a power of two number: 1, 2, 4, 8, 16, 32, etc. To toggle each flag, you add them together. The resulting sum is what appears in a variable or structure member.

If it is not apparent already, setting a bitfield to 0 disables all flags.

Notable bitfields include:

See the complete list of bitfields.