---
type: "fhirpath-function"
title: "FHIRPath Function: toString"
function: "toString"
category: "Conversion"
section: "5.5.8.1"
source: "fhirpath/functions.json"
---
# FHIRPath Function: toString
_No canonical section match found in index.md._
## Summary
- **Category**: Conversion
- **Section**: `5.5.8.1`
- **Return Type**: `String`
- **Empty Input Result**: `empty`
- **Errors on Multiple Input**: `true`
## Description
If the input collection contains a single item, this function will return a single String if the item is a String, an Integer, Decimal, Date, Time, DateTime, or Quantity, or a Boolean.
## Arguments
- none
## Type Mapping
- `String-String`
- `Integer-String`
- `Decimal-String`
- `Date-String`
- `Time-String`
- `DateTime-String`
- `Quantity-String`
- `Boolean-String`
## Example
```fhirpath
123.toString() // returns '123'
```