> For the complete documentation index, see [llms.txt](https://flowtestai.gitbook.io/flowtestai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://flowtestai.gitbook.io/flowtestai/flow-nodes/assert-node.md).

# Assert Node

An assert node can be used to define a condition and then whether that condition is true or false, one can define two different paths in the flow. An assert node takes two variables and an operator.

## Variables

Each variable can be of the following type - 

* **Select** - Selects a part of the output from the previous node. For instance previous node is request node that outputs `{ "id": 10, "category" : [ {"id" : 10, "status" : "available"} ], .....}` , then you can use `id` or `category.0.id`  to assign value to the variable. The actual values will be calculated on the fly when the graph is run.
* **String** - Assigns a value of type string to the variable.  
* **Number** - Assigns a value of type number to the variable. 
* **Boolean** - Assigns a value of type boolean to the variable.  
* **Now** - Assigns a value of type now() epoch timestamp to the variable. The value of now() is calculated on the fly during graph run. 
* **Variable** - You can reference any other variable from the set of global variables defined in the workflow.

<figure><img src="/files/1k2frKAdY1uWh2k3FdxY" alt=""><figcaption></figcaption></figure>

## Operator

Currently we support `isEqualTo, isNotEqualTo, isGreaterThan, isLessThan` but feel free to contribute other types of operators.