off-by-one error
(redirected from Off by one errors)off-by-one error
(programming)An exceedingly common error induced in many
ways, such as by starting at zero when you should have started
at one or vice-versa, or by writing "< N" instead of "<= N" or
vice-versa. Often confounded with fencepost error, which is
properly a particular subtype of it.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)