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# ENAPIVersion

A number that specifies the version of the API to use.

## Discussion

> Important:
> This type is available in iOS 12.5, and in iOS 13.7 and later.

iOS 13.7 introduces a new method to calculate the user’s Exposure Risk Value, described in <doc://com.apple.documentation/documentation/ExposureNotification/ENExposureConfiguration>. Set this value to `2` to use this new version and its calculation method, or set this value to `1` to use the earlier API and its calculation method. If you don’t explicitly set this value, the default is `1`.

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