Parity bit

A parity bit, or check bit, is a bit added to a string of binary code to ensure that the total number of 1-bits in the string is even or odd. Parity bits are used as the simplest form of error detecting code.Alice wants to transmit: 1001Alice wants to transmit: 1001Error in the second bit Alice computes parity bit value: 1^0^0^1 = 0Error in the parity bit Alice computes even parity value: 1^0^0^1 = 0Two corrupted bits Alice computes even parity value: 1^0^0^1 = 0 A parity bit, or check bit, is a bit added to a string of binary code to ensure that the total number of 1-bits in the string is even or odd. Parity bits are used as the simplest form of error detecting code. There are two variants of parity bits: even parity bit and odd parity bit.