Editing Hamming code (section)

====Two-out-of-five code====
{{main|Two-out-of-five code}}

A two-out-of-five code is an encoding scheme which uses five bits consisting of exactly three 0s and two 1s. This provides <math>\binom{5}{3}=10</math> possible combinations, enough to represent the digits 0–9. This scheme can detect all single bit-errors, all odd numbered bit-errors and some even numbered bit-errors (for example the flipping of both 1-bits). However it still cannot correct any of these errors.