# Decimal.ParseStrategy A parse strategy for creating decimal values from formatted strings. ``` struct ParseStrategy where Format : FormatStyle, Format.FormatInput == Decimal ``` ## Overview Create an explicit [`Decimal.ParseStrategy`](/documentation/Foundation/Decimal/ParseStrategy) to parse mulitple strings according to the same parse strategy. In the following example, `usCurrencyStrategy` is a [`Decimal.ParseStrategy`](/documentation/Foundation/Decimal/ParseStrategy) 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. ```swift let usCurrencyStrategy: Decimal.ParseStrategy = Decimal.FormatStyle.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 [`init(_:format:lenient:)`](/documentation/Foundation/Decimal/init(_:format:lenient:)-3u6o6) initializer, which takes a source and a `format` parameter to parse the string according to the provided [`Decimal.FormatStyle`](/documentation/Foundation/Decimal/FormatStyle). The following example parses a string that represents a currency value in US dollars. ```swift let formattedUSDollars = "$1,234.56" let parsedUSDollars = try? Decimal(formattedUSDollars, format: .currency(code: "USD") .locale(Locale(identifier: "en_US"))) // 1234.56 ``` Decimal also has an [`init(_:strategy:)`](/documentation/Foundation/Decimal/init(_:strategy:)) initializer, if it’s more convenient to pass a [`Decimal.ParseStrategy`](/documentation/Foundation/Decimal/ParseStrategy) instance rather than implicitly derive a strategy from a [`Decimal.FormatStyle`](/documentation/Foundation/Decimal/FormatStyle). ## Topics ### Creating a decimal parse strategy [`init(format: Format, lenient: Bool)`](/documentation/Foundation/Decimal/ParseStrategy/init(format:lenient:)-46ix2) Creates a parse strategy instance using the specified decimal format style. [`init(format: Format, lenient: Bool)`](/documentation/Foundation/Decimal/ParseStrategy/init(format:lenient:)-22h06) Creates a parse strategy instance using the specified decimal currency format style. [`init(format: Format, lenient: Bool)`](/documentation/Foundation/Decimal/ParseStrategy/init(format:lenient:)-36ja3) Creates a parse strategy instance using the specified decimal percentage format style. ### Parsing strings [`func parse(String) throws -> Format.FormatInput`](/documentation/Foundation/Decimal/ParseStrategy/parse(_:)) Parses a decimal string in accordance with this strategy and returns the parsed value. ### Accessing strategy properties [`var formatStyle: Format`](/documentation/Foundation/Decimal/ParseStrategy/formatStyle) The format style this strategy uses when parsing strings. [`var lenient: Bool`](/documentation/Foundation/Decimal/ParseStrategy/lenient) A Boolean value that indicates whether parsing allows any discrepencies in the expected format. ### Applying date-parsing strategies ### Supporting types ### Default Implementations [ParseStrategy Implementations](/documentation/Foundation/Decimal/ParseStrategy/ParseStrategy-Implementations) ## Relationships ### Conforms To [`Equatable`](/documentation/Swift/Equatable) [`Encodable`](/documentation/Swift/Encodable) [`SendableMetatype`](/documentation/Swift/SendableMetatype) [`Decodable`](/documentation/Swift/Decodable) [`Hashable`](/documentation/Swift/Hashable) [`ParseStrategy`](/documentation/Foundation/ParseStrategy) [`Sendable`](/documentation/Swift/Sendable) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)