# Rule Operator Quick Start Reference

Use this reference to help you use rules correctly and efficiently in your segment rules.

This topic includes:

* [= Is Operator](#-is-operator)
* [= Is (Multiple) Operator](#-is-multiple-operator)
* [!= is not Operator](#-is-not-operator)
* [!= is not (multiple) Operator](#-is-not-multiple-operator)
* [Starts with Operator](#starts-with-operator)
* [Is not null Operator](#is-not-null-operator)


## = Is Operator

![](/assets/isoperator.85b65cbf3961873629d521f3686e527bfe58b0054ce741209a21903e262497b4.cf3845cb.png)

## = Is (Multiple) Operator

![](/assets/ismultipleops.b180b990e04ecbb54e1c6835def5995f24f32b8de384cfbfba525976fe40bfaf.cf3845cb.png)

## != is not Operator

![](/assets/isnotequalops.e1cc8b5b781f3bf296dcfc8e870e1a296356388e4207405b79c481c728c609fa.cf3845cb.png)

## != is not (multiple) Operator

![](/assets/isnotmultiple.cc04dcc44d4f2f957460bb30a56bff363b4a7e1ad1a9ec12cf4301ed4a10f92e.cf3845cb.png)

## Starts with Operator

![](/assets/startswithops.374bc77f7f8324abfcbbd47bd1b03f067f21d1f8591e1bd8de17d08566c68fe0.cf3845cb.png)

## Is not null Operator

![](/assets/isnotnull.51dc08ab26d1e82e66c34181e6ff60d8ec2d66c24eddbbf5f1099d623493e56d.cf3845cb.png)