# init(value:step:format:label:onEditingChanged:) Creates a stepper configured to increment or decrement a binding to a value using a step value you provide, displaying its value with an applied format style. ``` nonisolated init(value: Binding, step: F.FormatInput.Stride = 1, format: F, @ContentBuilder label: () -> Label, onEditingChanged: @escaping (Bool) -> Void = { _ in }) where F : ParseableFormatStyle, F.FormatInput : BinaryFloatingPoint, F.FormatOutput == String ``` ## Parameters `value` The [`Binding`](/documentation/SwiftUI/Binding) to a value that you provide. `step` The amount to increment or decrement `value` each time the user clicks or taps the stepper’s increment or decrement buttons. Defaults to `1`. `format` A format style of type `F` to use when converting between the string the user edits and the underlying value of type `F.FormatInput`. If `format` can’t perform the conversion, the stepper leaves `value` unchanged. If the user stops editing the text in an invalid state, the stepper updates the text to the last known valid value. `label` A view describing the purpose of this stepper. `onEditingChanged` A closure that’s called when editing begins and ends. For example, on iOS, the user may touch and hold the increment or decrement buttons on a stepper which causes the execution of the `onEditingChanged` closure at the start and end of the gesture. ## Discussion Use this initializer to create a stepper that increments or decrements a bound value by a specific amount each time the user clicks or taps the stepper’s increment or decrement buttons, while displaying the current value. In the example below, a stepper increments or decrements `value` by the `step` value of 5 at each click or tap of the control’s increment or decrement button: ``` struct StepperView: View { @State private var value = 1.0 private let step = 5.0 var body: some View { Stepper(value: $value, step: step, format: .number) { Text("Current value: \(value), step: \(step)") } .padding(10) } } ```  --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)