---
title: "isBadOrError"
description: "Tests to see whether or not the given value's quality is either bad or error."
---

# isBadOrError

> Tests to see whether or not the given value's quality is either bad or error.

**This function is used by Ignition's Expression language.**

## Description

Tests to see whether or not the given value's [quality](platform/tags/quality-codes-and-overlays/quality-codes-and-overlays.md) is either bad or error.

## Syntax

`isBadOrError(value)`

### Parameters

| Type   | Parameter | Description                                          |
|--------|-----------|------------------------------------------------------|
| Object | `value`   | A value to check if its quality is either bad or error. |

### Returns

**Boolean** - Returns true if the value's quality is either bad or error, or false if it is not.

## Examples

```py title="Code Snippet"
isBadOrError({path/to/myTag}) //Returns 1 if the value's quality is bad or error, 0 otherwise.
```