An interval in which one endpoint is included but not the other. A half-closed interval is denoted or and is also called a half-open interval. The non-standard notation and is sometimes also used.

# Half-Closed Interval

## See also

Closed Interval, Interval, Open Interval## Explore with Wolfram|Alpha

## Cite this as:

Weisstein, Eric W. "Half-Closed Interval."
From *MathWorld*--A Wolfram Web Resource. https://mathworld.wolfram.com/Half-ClosedInterval.html