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# minimumSignificantDigits

The minimum number of significant digits for the number formatter.

```
var minimumSignificantDigits: Int { get set }
```

## Discussion

You must set the [`usesSignificantDigits`](/documentation/Foundation/NumberFormatter/usesSignificantDigits) property to <doc://com.apple.documentation/documentation/Swift/true> in order for this property to affect formatting behavior. By default, the minimum number of significant digits is 1.

The following code demonstrates the effect of setting [`minimumSignificantDigits`](/documentation/Foundation/NumberFormatter/minimumSignificantDigits) when formatting various numbers:

```swift
var numberFormatter = NumberFormatter()
numberFormatter.usesSignificantDigits = true
numberFormatter.minimumSignificantDigits = 4

numberFormatter.string(from: 123) // 123.0
numberFormatter.string(from: 123.45) // 123.45
numberFormatter.string(from: 100.23) // 100.23
numberFormatter.string(from: 1.2300) // 1.230
numberFormatter.string(from: 0.000123) // 0.0001230
```

---

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