Work out parity bit instantly with clear inputs, formula shown and shareable results.
A parity bit is appended so the total number of ones has a chosen parity. Even parity makes the total even, odd parity makes it odd. A single flipped bit changes the count and is therefore detected.
Even parity
parity bit = 0 if the data has an even number of ones, otherwise 1
There are five ones, an odd count, so the parity bit is 1 and the word becomes 10110111.
Any even number of errors. Two flipped bits leave the parity unchanged, which is why serious links use CRC or Hamming codes.