# localizedInteger(locale:) Creates a regex component that matches a localized numeric string, capturing it as an integer value. ``` static func localizedInteger(locale: Locale) -> Self ``` ## Parameters `locale` The locale that specifies formatting conventions to use when matching numeric strings. ## Return Value A `RegexComponent` that matches localized substrings as [`Int`](/documentation/Swift/Int) instances. ## Discussion This method matches decimal substrings in accordance with the provided locale. For example, the value `1234567890` formats as `1,234,567,890` in the `en_US` locale, as `1 234 567 890` in the `FR` locale, and as `1234567890` in the `JP` locale. Because of this, the regex needs to know what locale convention to match against. The following example creates a [`Regex`](/documentation/Swift/Regex) that matches a date and time followed by whitespace and an integer formatted in the `en_US` locale. It then matches this regex against a source string containing a date with this format, some whitespace, and an integer value. ``` let enUSLocale = Locale(languageCode: .english, languageRegion: .unitedStates) let source = "7/31/2022, 5:15:12 AM 49,525" let matcher = Regex { One(.dateTime(date: .numeric, time: .standard, locale: enUSLocale, timeZone: TimeZone(identifier: "PST")!)) OneOrMore(.horizontalWhitespace) Capture { One(.localizedInteger(locale: enUSLocale)) } } guard let match = source.firstMatch(of: matcher) else { return } let matchedInteger = match?.1 // matchedInteger == 49525 ``` --- 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)