---
title: FloatingPointParseStrategy
framework: foundation
role: symbol
role_heading: Structure
path: foundation/floatingpointparsestrategy
---

# FloatingPointParseStrategy

A parse strategy for creating floating-point values from formatted strings.

## Declaration

```swift
struct FloatingPointParseStrategy<Format> where Format : FormatStyle, Format.FormatInput : BinaryFloatingPoint
```

## Overview

Overview Create an explicit FloatingPointParseStrategy to parse multiple strings according to the same parse strategy. In the following example, usCurrencyStrategy is a FloatingPointParseStrategy that uses US dollars and the en_US locale’s conventions for number formatting. The example then uses this strategy to parse an array of strings, some of which represent valid US currency values. let usCurrencyStrategy: FloatingPointParseStrategy = FloatingPointFormatStyle<Double>.Currency(code: "USD",                                           locale: Locale(identifier: "en_US"))     .parseStrategy let currencyValues = ["$100.11", "$1,000.22", "$10,000.33", "€100.44"] let parsedValues = currencyValues.map { try? usCurrencyStrategy.parse($0) } // [Optional(100.11), Optional(1000.22), Optional(10000.33), nil] You don’t need to instantiate a parse strategy variable to parse a single string. Instead, use the BinaryFloatingPoint initializers that take a source String and a format parameter to parse the string according to the provided FormatStyle. The following example parses a string that represents a currency value in US dollars. let formattedUSDollars = "$1,234.56" let parsedUSDollars = try? Double(formattedUSDollars, format: .currency(code: "USD")     .locale(Locale(identifier: "en_US"))) // 1234.56

## Topics

### Creating a floating-point parse strategy

- [init(format:lenient:)](foundation/floatingpointparsestrategy/init(format:lenient:)-5nxey.md)
- [init(format:lenient:)](foundation/floatingpointparsestrategy/init(format:lenient:)-9g6wm.md)
- [init(format:lenient:)](foundation/floatingpointparsestrategy/init(format:lenient:)-1nldg.md)

### Parsing strings

- [parse(_:)](foundation/floatingpointparsestrategy/parse(_:).md)

### Accessing strategy properties

- [formatStyle](foundation/floatingpointparsestrategy/formatstyle.md)
- [lenient](foundation/floatingpointparsestrategy/lenient.md)

### Default Implementations

- [ParseStrategy Implementations](foundation/floatingpointparsestrategy/parsestrategy-implementations.md)

## Relationships

### Conforms To

- [Copyable](swift/copyable.md)
- [Decodable](swift/decodable.md)
- [Encodable](swift/encodable.md)
- [Equatable](swift/equatable.md)
- [Escapable](swift/escapable.md)
- [Hashable](swift/hashable.md)
- [ParseStrategy](foundation/parsestrategy.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Data parsing in Swift

- [ParseableFormatStyle](foundation/parseableformatstyle.md)
- [ParseStrategy](foundation/parsestrategy.md)
- [IntegerParseStrategy](foundation/integerparsestrategy.md)
- [Decimal.ParseStrategy](foundation/decimal/parsestrategy.md)