---
title: "exists"
slug: "cache-exists"
updated: 2026-02-04T21:40:27Z
published: 2026-02-04T21:40:27Z
canonical: "docs.doc-know.com/cache-exists"
---

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# exists

### cache.exists

Returns whether or not an item currently exists in cache.

### Input Parameters

| Name | Type | Required | Description |
| --- | --- | --- | --- |
| **key** | Text | Yes | Unique item identifier |

### Returns

Type: **Boolean**

Returns **true** if item exists in cache. Otherwise, **false** is returned.

### Examples

```
// check if score value is cached
if (cache.exists("score") === true)
    debug.log("Item exists.");
```

### Remarks

Use this function when you need to test if an item already exists in cache memory.

          Definition

          

**Cache** is a programming term referring to a simple database of information. A cache is a collection of associated **key-value pairs**. The **key** must be a unique identifier and the **value** is any object you want to store. Once stored, you can retrieve these objects using their keys.