---
type: "fhirpath-function"
title: "FHIRPath Function: count"
function: "count"
category: "Existence"
section: "5.1.10"
source: "fhirpath/functions.json"
---
# FHIRPath Function: count
Returns the integer count of the number of items in the input collection. Returns 0 when the input collection is empty.
## Summary
- **Category**: Existence
- **Section**: `5.1.10`
- **Return Type**: `Integer`
- **Empty Input Result**: `0`
- **Errors on Multiple Input**: `false`
## Description
Returns the integer count of the number of items in the input collection. Returns 0 when the input collection is empty.
## Arguments
- none
## Type Mapping
- `Any-Integer`
## Example
```fhirpath
Patient.name.count() // returns the number of name elements
```