(1) Closed Interval: Let a and b are two given real numbers such that , then
(2) Open Interval: Let a and b are two given real numbers such that then or
(3) Closed-open Interval: Let a and b are two given real numbers such that , then
(4) Open-closed Interval: Let a and b are two given real numbers such that then
- Real number, R represented as
- can be represented as
- can be represented as
- We can’t represent Natural numbers, Integers, whole numbers in intervals.
Examples: