# FloatingPointFormatStyle.Percent A format style that converts between floating-point percentage values and their textual representations. ``` struct Percent ``` ## Topics ### Creating a floating-point percent format style [`init(locale: Locale)`](/documentation/Foundation/FloatingPointFormatStyle/Percent/init(locale:)) Creates a floating-point percent format style that uses the given locale. ### Customizing style behavior [`func decimalSeparator(strategy: FloatingPointFormatStyle.Percent.Configuration.DecimalSeparatorDisplayStrategy) -> FloatingPointFormatStyle.Percent`](/documentation/Foundation/FloatingPointFormatStyle/Percent/decimalSeparator(strategy:)) Modifies the format style to use the specified decimal separator display strategy. [`func grouping(FloatingPointFormatStyle.Percent.Configuration.Grouping) -> FloatingPointFormatStyle.Percent`](/documentation/Foundation/FloatingPointFormatStyle/Percent/grouping(_:)) Modifies the format style to use the specified grouping. [`func locale(Locale) -> FloatingPointFormatStyle.Percent`](/documentation/Foundation/FloatingPointFormatStyle/Percent/locale(_:)) Modifies the format style to use the specified locale. [`func notation(FloatingPointFormatStyle.Percent.Configuration.Notation) -> FloatingPointFormatStyle.Percent`](/documentation/Foundation/FloatingPointFormatStyle/Percent/notation(_:)) Modifies the format style to use the specified notation. [`func precision(FloatingPointFormatStyle.Percent.Configuration.Precision) -> FloatingPointFormatStyle.Percent`](/documentation/Foundation/FloatingPointFormatStyle/Percent/precision(_:)) Modifies the format style to use the specified precision. [`func rounded(rule: FloatingPointFormatStyle.Percent.Configuration.RoundingRule, increment: Double?) -> FloatingPointFormatStyle.Percent`](/documentation/Foundation/FloatingPointFormatStyle/Percent/rounded(rule:increment:)) Modifies the format style to use the specified rounding rule and increment. [`func scale(Double) -> FloatingPointFormatStyle.Percent`](/documentation/Foundation/FloatingPointFormatStyle/Percent/scale(_:)) Modifies the format style to use the specified scale. [`func sign(strategy: FloatingPointFormatStyle.Percent.Configuration.SignDisplayStrategy) -> FloatingPointFormatStyle.Percent`](/documentation/Foundation/FloatingPointFormatStyle/Percent/sign(strategy:)) Modifies the format style to use the specified sign display strategy. [`typealias Configuration`](/documentation/Foundation/FloatingPointFormatStyle/Percent/Configuration) The type the format style uses for configuration settings. [`enum NumberFormatStyleConfiguration`](/documentation/Foundation/NumberFormatStyleConfiguration) Configuration settings for formatting numbers of different types. ### Formatting floating-point percent values [`func format(Value) -> String`](/documentation/Foundation/FloatingPointFormatStyle/Percent/format(_:)) Formats an floating-point value, using this style. ### Creating attributed strings [`var attributed: FloatingPointFormatStyle.Attributed`](/documentation/Foundation/FloatingPointFormatStyle/Percent/attributed) An attributed format style based on the floating-point percent format style. [`struct Attributed`](/documentation/Foundation/FloatingPointFormatStyle/Attributed-swift.struct) A format style that converts integers into attributed strings. ### Accessing style properties [`var locale: Locale`](/documentation/Foundation/FloatingPointFormatStyle/Percent/locale) The locale of the format style. ### Applying currency styles ### Applying measurement styles ### Applying list styles ### Parsing floating-point percent values [`var parseStrategy: FloatingPointParseStrategy.Percent>`](/documentation/Foundation/FloatingPointFormatStyle/Percent/parseStrategy) The parse strategy that this format style uses. ### Locating percent values in regular expressions [`func consuming(String, startingAt: String.Index, in: Range) throws -> (upperBound: String.Index, output: Value)?`](/documentation/Foundation/FloatingPointFormatStyle/Percent/consuming(_:startingAt:in:)) Process the input string within the specified bounds, beginning at the given index, and return the end position (upper bound) of the match and the produced output. ### Supporting types ### Default Implementations [CustomConsumingRegexComponent Implementations](/documentation/Foundation/FloatingPointFormatStyle/Percent/CustomConsumingRegexComponent-Implementations) [FormatStyle Implementations](/documentation/Foundation/FloatingPointFormatStyle/Percent/FormatStyle-Implementations) [ParseableFormatStyle Implementations](/documentation/Foundation/FloatingPointFormatStyle/Percent/ParseableFormatStyle-Implementations) ## Relationships ### Conforms To [`SendableMetatype`](/documentation/Swift/SendableMetatype) [`Hashable`](/documentation/Swift/Hashable) [`CustomConsumingRegexComponent`](/documentation/Swift/CustomConsumingRegexComponent) [`Escapable`](/documentation/Swift/Escapable) [`FormatStyle`](/documentation/Foundation/FormatStyle) [`ParseableFormatStyle`](/documentation/Foundation/ParseableFormatStyle) [`Copyable`](/documentation/Swift/Copyable) [`Equatable`](/documentation/Swift/Equatable) [`RegexComponent`](/documentation/Swift/RegexComponent) [`Decodable`](/documentation/Swift/Decodable) [`Sendable`](/documentation/Swift/Sendable) [`Encodable`](/documentation/Swift/Encodable) --- Copyright © 2026 Apple Inc. 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