, Next:
, Previous:
, Up:
off-by-one error n.
[common] Exceedingly common error induced in many ways, such as by starting at 0 when you should have started at 1 or vice-versa, or by writing < N instead of <= N or vice-versa. Also applied to giving something to the person next to the one who should have gotten it. Often confounded with [fencepost error], which is properly a particular subtype of it.