# SwiftUI: formatting decimals in Text view

> Learn how to format a decimal number in a SwiftUI Text view using the specifier parameter, so a Double like 34.000000 finally shows as a clean 34.

Author: Flavio Copes | Published: 2021-10-02 | Canonical: https://flaviocopes.com/swiftui-formatting-decimals-text-view/

When we use the `Slider` view to select a value, we have to use a `Double` value and this causes a problem, because when it's time to show the value in a `Text` view, number 34 appears as `34.000000`, despite us using a `step` value of 1, meaning we can only select integer values in our slider:

```swift
struct ContentView: View {
    @State private var age: Double = 0
    
    var body: some View {
        Form {
            Slider(value: $age, in: 0...100, step: 1)
            Text("\(age)")
        }
    }
}
```

![iOS simulator showing SwiftUI form with slider value displayed as unformatted decimal 34.000000](https://flaviocopes.com/images/swiftui-formatting-decimals-text-view/Screen_Shot_2021-09-23_at_19.30.46.png)

Let's see how we can format this value to show `34` instead.

When we interpolate the value of `age` in the `Text` view, we can provide an additional parameter called `specifier`.

This specifier lets us use a string format specifier. You can lookup the available options in the [Apple documentation for String](https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/Strings/Articles/formatSpecifiers.html).

In our case, we can use `$.0f`:

```swift
Text("\(age, specifier: "%.0f")")
```

See? Now we get `20` instead of `20.000000`:

![iOS simulator showing SwiftUI form with slider value displayed as clean integer 20 after applying formatting](https://flaviocopes.com/images/swiftui-formatting-decimals-text-view/Screen_Shot_2021-09-23_at_20.45.18.png)