---
type: "fhirpath-function"
title: "FHIRPath Function: empty"
function: "empty"
category: "Existence"
section: "5.1.1"
source: "fhirpath/functions.json"
---
# FHIRPath Function: empty
Returns `true` if the input collection is empty (`{ }`) and `false` otherwise.

<a name="fn-exists"></a>
## Summary
- **Category**: Existence
- **Section**: `5.1.1`
- **Return Type**: `Boolean`
- **Empty Input Result**: `true`
- **Errors on Multiple Input**: `false`
## Description
Returns `true` if the input collection is empty (`{ }`) and `false` otherwise.
## Arguments
- none
## Type Mapping
- `Any-Boolean`
## Example
```fhirpath
Patient.name.empty() // returns true if the patient has no names
```