Parity may refer to:

• Parity (computing)
  • Parity bit in computing, sets the parity of data for the purpose of error detection
  • Parity flag in computing, indicates if the number of set bits is odd or even in the binary representation of the result of the last operation
  • Parity file in data processing, created in conjunction with data files and used to check data integrity and assist in data recovery

• Parity (mathematics), indicates whether a number is even or odd
  • Parity of a permutation, indicates whether a permutation has an even or odd number of inversions
  • Parity function, a Boolean function whose value is 1 if the input vector has an odd number of ones
  • Parity learning, a problem in machine learning
  • Parity of even and odd functions

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