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# localizedIntegerPercentage(locale:)

Creates a regex component that matches a localized percentage string, capturing it as a double-precision floating-point value.

```
static func localizedIntegerPercentage(locale: Locale) -> Self
```

## Parameters

`locale`

The locale that specifies formatting conventions to use when matching percentage strings.

## Return Value

A `RegexComponent` that matches percentage substrings as [`Int`](/documentation/Swift/Int) instances.

## Discussion

This method matches percentage substrings in accordance with the provided locale. For example, in the `en_US` locale, `75` formats as `75%`, and `1234` formats as `1,234%`. Other locales use different separators, or omit them entirely. 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 a percentage string formatted in the `en_US` locale. It then matches this regex against a source string containing a date with this format, some whitespace, and a percentage string.

```
let enUSLocale = Locale(languageCode: .english, languageRegion: .unitedStates)
let source = "7/31/2022, 5:15:12 AM  75%"
let matcher = Regex {
    One(.dateTime(date: .numeric,
                  time: .standard,
                  locale: enUSLocale,
                  timeZone: TimeZone(identifier: "PST")!))
    OneOrMore(.horizontalWhitespace)
    Capture {
        One(.localizedIntegerPercentage(locale: enUSLocale))
    }
}
guard let match = source.firstMatch(of: matcher) else { return }
let percentage = match?.1 // percentage == 75
```

---

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