Numbers In Text

Part of the Introduction to SwiftUI section of Coddy's Swift journey. Lesson 4 of 50.

An Int in a Text literal shows as you expect, but a Double does not. SwiftUI formats it with six decimal places:

let price = 3.5

Text("Price: \(price)")

This shows Price: 3.500000. Add a specifier to choose the format:

Text("Price: \(price, specifier: "%.2f")")

%.2f means two digits after the decimal point, so the text is Price: 3.50. %.1f gives one digit and %.0f rounds to a whole number.

Challenge

Easy

The price shows six decimal places. Change the text so it shows Price: $4.50, with exactly two digits after the decimal point.

Try it yourself

import SwiftUI

@main
struct CoddyApp: App {
    var body: some Scene {
        WindowGroup {
            ContentView()
        }
    }
}

Test yourself

This lesson includes a short quiz. Start the lesson to answer it and track your progress.

All lessons in Introduction to SwiftUI

1Introduction

4Modifiers

7Lists

10Project - Coddy Coffee

2Showing Content

5State & Buttons

8Navigation

11Final Challenges

3Stacks & Layout

6User Input

9Sharing Data

Practice on your own: Swift playground