Interval notation is a way of writing subsets of the real number line . ... An open interval is one that does not include its endpoints, for example, {x | −3<x<1} .

What is an example of interval notation?

Interval notation is a method to represent an interval on a number line. For example, the set of numbers x satisfying 0 ≤ x ≤ 5 is an interval that contains 0, 5, and all numbers between 0 and 5. ... Let us understand the interval notation and different types of intervals in detail using solved examples.

How do I write in interval notation?

Intervals are written with rectangular brackets or parentheses, and two numbers delimited with a comma. The two numbers are called the endpoints of the interval. The number on the left denotes the least element or lower bound. The number on the right denotes the greatest element or upper bound.