Sentinel Value

+A **sentinel value** is a special marker, distinct from actual data, used to signify the end of a data sequence or a specific condition within an algorithm. It acts as a silent guardian, like a [Boundary](/wiki/Boundary) or a [Flag](/wiki/Flag), guiding program logic without being processed as true information.

+## See also

+- [Null](/wiki/Null)

+- [EOF](/wiki/EOF)

+- [Marker](/wiki/Marker)