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# isForPersonMassUse

A Boolean value that indicates whether the resulting string represents a person’s mass.

```
var isForPersonMassUse: Bool { get set }
```

## Discussion

Returns <doc://com.apple.documentation/documentation/Swift/true> if the value passed to [`string(fromKilograms:)`](/documentation/Foundation/MassFormatter/string(fromKilograms:)) or [`unitString(fromKilograms:usedUnit:)`](/documentation/Foundation/MassFormatter/unitString(fromKilograms:usedUnit:)) is a person’s mass; otherwise, <doc://com.apple.documentation/documentation/Swift/false>. By default, this property returns <doc://com.apple.documentation/documentation/Swift/false>.

The mass formatter uses this property when determining the best unit for a given locale (for example, in the [`string(fromKilograms:)`](/documentation/Foundation/MassFormatter/string(fromKilograms:)) method).

---

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