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# isIndeterminate

A Boolean value that indicates whether the tracked progress is indeterminate.

```
var isIndeterminate: Bool { get }
```

## Discussion

Use [`isIndeterminate`](/documentation/Foundation/Progress/isIndeterminate) progress only when you’re unable to determine a reasonable value for either [`completedUnitCount`](/documentation/Foundation/Progress/completedUnitCount) or [`totalUnitCount`](/documentation/Foundation/Progress/totalUnitCount). Progress is indeterminate when the value of the [`totalUnitCount`](/documentation/Foundation/Progress/totalUnitCount) or [`completedUnitCount`](/documentation/Foundation/Progress/completedUnitCount) is less than zero or if both values are zero. When progress is indeterminate, [`fractionCompleted`](/documentation/Foundation/Progress/fractionCompleted) returns `0.0` and [`isFinished`](/documentation/Foundation/Progress/isFinished) returns `false`.

By default, [`Progress`](/documentation/Foundation/Progress) is KVO-compliant for this property. It sends notifications on the same thread that updates the property.

The following code snippet clarifies the behavior for setting both [`totalUnitCount`](/documentation/Foundation/Progress/totalUnitCount) and [`completedUnitCount`](/documentation/Foundation/Progress/completedUnitCount) to `0`.

```swift
let progress = Progress(totalUnitCount: 0) 
progress.completedUnitCount = 0 // default 
print("totalUnitCount: (progress.totalUnitCount)") 
print("completedUnitCount: (progress.completedUnitCount)") 
print("isIndeterminate: (progress.isIndeterminate)") 
print("fractionCompleted: (progress.fractionCompleted)") 
print("isFinished: (progress.isFinished)")
/*
Code Output:
totalUnitCount: 0 completedUnitCount: 0 isIndeterminate: true fractionCompleted: 0.0 isFinished: false
*/
```

---

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