boolean
adjectiveUK /ˈbuːliən/
US /ˈbuːliən/
A boolean is a value that can only be true or false.
The program checks a boolean to decide whether the door is open.
OTHER MEANINGS
2. Relating to a system of logic that uses only the values true and false.
Boolean algebra simplifies circuits that switch on and off.
3. In computing, a data type that stores only true or false.
Set the boolean flag to true before running the test.
4. A search method that combines words with AND, OR, and NOT.
Use a boolean search to find articles about cats and dogs.